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Half-Lives of Radioactive Isotopes

Half-Lives of Radioactive Isotopes

PT = Planck time unit
PT = √(ћG/c⁵) = 5.391247e-44 sec

1 yoctosecond = 1e-24 sec = 1.85485844e+19 PT

hydrogen-7, 23e-24 sec
lithium-4, 75.6e-24 sec
hydrogen-5, 80e-24 sec
hydrogen-4, 139e-24 sec
nitrogen-10, 200e-24 sec
hydrogen-6, 290e-24 sec
lithium-5, 304e-24 sec
boron-7, 350e-24 sec
fluorine-15, 460e-24 sec
nitrogen-11, 590e-24 sec
nitrogen-11m, 690e-24 sec
helium-5, 760e-24 sec

1 zeptosecond = 1e-21 sec = 1.85485844e+22 PT

oxygen-12, 1.14e-21 sec
sodium-18, 1.34e-21 sec
helium-10, 1.52e-21 sec
lithium-10, 2e-21 sec
carbon-8, 2e-21 sec
beryllium-13, 2.7e-21 sec
helium-7, 3.040e-21 sec
neon-16, 3.74e-21 sec
beryllium-6, 5e-21 sec
helium-9, 7e-21 sec
fluorine-16, 11e-21 sec
boron-9, 845e-21 sec

1 attosecond = 1e-18 sec = 1.85485844e+25 PT

beryllium-8, 81.9e-18 sec

1 femtosecond = 1e-15 sec = 1.85485844e+28 PT

oxygen-27, 1.75e-15 sec

1 picosecond = 1e-12 sec = 1 psec = 1.85485844e+31 PT

boron-16, ≤190e-12 sec

1 nanosecond = 1e-9 sec = 1 nsec = 1.85485844e+34 PT

lithium-12, <10e-9 sec
boron-18, 26e-9 sec
carbon-21, 30e-9 sec
fluorine-28, 40e-9 sec
oxygen-26, 40e-9 sec
sodium-19, 40e-9 sec
oxygen-25, 50e-9 sec
nitrogen-24, 52e-9 sec
protactinium-219, 53e-9 sec
neon-34, 60e-9 sec
sodium-37, 60e-9 sec
protactinium-220m2, 69e-9 sec
actinium-217, 69e-9 sec
uranium-236m1, 100e-9 sec
oxygen-28, 100e-9 sec
curium-247m2, 100.6e-9 sec
actinium-218m, 103e-9 sec
thorium-218, 109e-9 sec
neptunium-238m, 112e-9 sec
uranium-236m2, 120e-9 sec
americium-239m, 163e-9 sec
neon-33, 180e-9 sec
sodium-36, 180e-9 sec
curium-242m, 180e-9 sec
radium-216, 182e-9 sec
plutonium-239m1, 193e-9 sec
beryllium-15, 200e-9 sec
beryllium-16, 200e-9 sec
fluorine-31, 250e-9 sec
uranium-239m1, >250e-9 sec
fluorine-30, 260e-9 sec
nitrogen-25, 260e-9 sec
radium-208m, 270e-9 sec
uranium-238m, 280e-9 sec
curium-245m, 290e-9 sec
polonium-212, 299e-9 sec
protactinium-220m1, 308e-9 sec
plutonium-243m, 330e-9 sec
neptunium-222, 380e-9 sec
protactinium-229m, 420e-9 sec
curium-244m2, >500e-9 sec
radium-215m3, 555e-9 sec
berkelium-242m, 600e-9 sec
thorium-216m2, 615e-9 sec
uranium-221, 660e-9 sec
actinium-217m, 740e-9 sec
protactinium-220, 780e-9 sec
uranium-239m2, 780e-9 sec
radium-212m2, 850e-9 sec
plutonium-241m1, 880e-9 sec

1 microsecond = 0.000001 sec = 1e-6 sec = 1 μsec = 1.85485844e+37 PT

thorium-219, 1.05e-6 sec
curium-243m, 1.08e-6 sec
actinium-218, 1.08e-6 sec
plutonium-237m2, 1.1e-6 sec
americium-241m, 1.2e-6 sec
radium-215m2, 1.39e-6 sec
uranium-222, 1.4e-6 sec
radium-217, 1.63e-6 sec
neptunium-223, 2.15e-6 sec
radium-210m, 2.24e-6 sec
protactinium-221, 4.9e-6 sec
nobelium-250, 5.7e-6 sec
thorium-229m, 7e-6 sec
radium-215m1, 7.1e-6 sec
plutonium-239m2, 7.5e-6 sec
thorium-220, 9.7e-6 sec
radium-212m1, 10.9e-6 sec
actinium-219, 11.8e-6 sec
uranium-223, 21e-6 sec
plutonium-241m2, 21e-6 sec
fermium-251m, 21.1e-6 sec
curium-249m, 23e-6 sec
rutherfordium-254, 23e-6 sec
neptunium-220, 25e-6 sec
radium-218, 25.2e-6 sec
curium-247m1, 26.3e-6 sec
berkelium-250m1, 29e-6 sec
nobelium-253m, 31e-6 sec
americium-238m, 35e-6 sec
nobelium-250m, 36e-6 sec
neptunium-224, 38e-6 sec
californium-249m, 45e-6 sec
rutherfordium-253, 48e-6 sec
radium-231m, ~53e-6 sec
uranium-219, 55e-6 sec
berkelium-251m, 58e-6 sec
americium-246m2, 73e-6 sec
seaborgium-261m, 92e-6 sec
protactinium-218, 113e-6 sec
thorium-216m1, 137e-6 sec
curium-248m, 146e-6 sec
neptunium-219, 150e-6 sec
polonium-214, 164e-6 sec
darmstadtium-270, 205e-6 sec
berkelium-250m2, 213e-6 sec
darmstadtium-269, 230e-6 sec
copernicium-277, 240e-6 sec
thorium-217, 240e-6 sec
darmstadtium-273, 240e-6 sec
berkelium-249m, 300e-6 sec
nihonium-278, 340e-6 sec
hassium-265m, 360e-6 sec
fermium-258, 370e-6 sec
actinium-216, 440e-6 sec
actinium-216m, 443e-6 sec
hassium-264, 540e-6 sec
copernicium-277, 690e-6 sec
oganesson-294, 690e-6 sec
fermium-241, 730e-6 sec
hassium-263, 760e-6 sec
fermium-242, 800e-6 sec
mendelevium-245, 900e-6 sec
copernicium-282, 910e-6 sec
uranium-224, 940e-6 sec

1 millisecond = 0.001 sec = 1e-3 sec = 1 msec = 1.85485844e+40 PT

protactinium-217m, 1.08e-3 sec
meitnerium-266, 1.2e-3 sec
nobelium-258, 1.2e-3 sec
uranium-216m, 1.31e-3 sec
nihonium-278, 1.4e-3 sec
sodium-35, 1.5e-3 sec
darmstadtium-271m, 1.7e-3 sec
thorium-208, 1.7e-3 sec
thorium-221, 1.73e-3 sec
hassium-265, 1.96e-3 sec
roentgenium-272, 2e-3 sec
thorium-222, 2.237e-3 sec
uranium-215, 2.24e-3 sec
fluorine-29, 2.5e-3 sec
flerovium-284, 2.5e-3 sec
boron-19, 2.92e-3 sec
seaborgium-258, 3e-3 sec
hassium-266, 3.02e-3 sec
fermium-244, 3.12e-3 sec
protactinium-222, 3.2e-3 sec
neon-31, 3.4e-3 sec
protactinium-217, 3.48e-3 sec
neon-32, 3.5e-3 sec
darmstadtium-277, 3.5e-3 sec
protactinium-211, 3.8e-3 sec
roentgenium-278, 4e-3 sec
seaborgium-260, 4e-3 sec
uranium-216, 4.3e-3 sec
beryllium-14, 4.35e-3 sec
meitnerium-278, 4.5e-3 sec
radon-196, 4.7e-3 sec
fluorine-27, 5e-3 sec
meitnerium-277, 5e-3 sec
nobelium-262, 5e-3 sec
boron-17, 5.08e-3 sec
protactinium-223, 5.1e-3 sec
americium-223, 5.2e-3 sec
sodium-34, 5.5e-3 sec
neptunium-225, 6e-3 sec
uranium-218, 6e-3 sec
carbon-22, 6.2e-3 sec
meitnerium-270, 6.3e-3 sec
rutherfordium-256, 6.4e-3 sec
thorium-209, 7e-3 sec
protactinium-213, 7e-3 sec
seaborgium-262, 7e-3 sec
neon-30, 7.3e-3 sec
protactinium-212, 8e-3 sec
sodium-33, 8e-3 sec
livermorium-290, 8.3e-3 sec
oxygen-13, 8.58e-3 sec
lithium-11, 8.59e-3 sec
fluorine-26, 9.6e-3 sec
bohrium-262m, 9.6e-3 sec
boron-15, 9.87e-3 sec
darmstadtium-270m, 10e-3 sec
hassium-277, 11e-3 sec
nitrogen-12, 11e-3 sec
bohrium-261, 11.8e-3 sec
roentgenium-274, 12e-3 sec
boron-14, 12.5e-3 sec
livermorium-292, 13e-3 sec
sodium-32, 13.2e-3 sec
americium-242m2, 14.0e-3 sec
protactinium-215, 14e-3 sec
nitrogen-23, 14.5e-3 sec
rutherfordium-258, 14.7e-3 sec
neon-29, 14.8e-3 sec
actinium-206m1, 15e-3 sec
carbon-20, 16e-3 sec
protactinium-214, 17e-3 sec
sodium-31, 17e-3 sec
thorium-210, 17e-3 sec
boron-13, 17.33e-3 sec
neon-28, 18.9e-3 sec
livermorium-291, 19e-3 sec
actinium-205, 20e-3 sec
rutherfordium-270, 20e-3 sec
meitnerium-275, 20e-3 sec
boron-12, 20.2e-3 sec
rutherfordium-260, 21e-3 sec
californium-238, 21.1e-3 sec
beryllium-12, 21.49e-3 sec
tennessine-293, 22e-3 sec
nitrogen-22, 24e-3 sec
actinium-206, 25e-3 sec
uranium-217, 26e-3 sec
actinium-220, 26.36e-3 sec
thorium-216, 26.8e-3 sec
meitnerium-268, 27e-3 sec
lawrencium-251, 27e-3 sec
actinium-208m, 28e-3 sec
sodium-28, 30.5e-3 sec
actinium-207, 31e-3 sec
neon-27, 32e-3 sec
uranium-234m, 33.5e-3 sec
curium-244m1, 34e-3 sec
bohrium-260, 35e-3 sec
neptunium-226, 35e-3 sec
thorium-212, 36e-3 sec
moscovium-287, 37e-3 sec
seaborgium-264, 37e-3 sec
dubnium-255, 37e-3 sec
actinium-206m2, 41e-3 sec
sodium-29, 44.9e-3 sec
carbon-19, 46.2e-3 sec
thorium-211, 48e-3 sec
sodium-30, 48.4e-3 sec
fluorine-25, 50e-3 sec
tennessine-294, 51e-3 sec
actinium-221, 52e-3 sec
hassium-267, 55e-3 sec
livermorium-293, 57e-3 sec
uranium-225, 61e-3 sec
oxygen-24, 65e-3 sec
nihonium-282, 73e-3 sec
nihonium-283, 75e-3 sec
oxygen-23, 82e-3 sec
bohrium-262, 84e-3 sec
nitrogen-21, 87e-3 sec
darmstadtium-271, 90e-3 sec
roentgenium-279, 90e-3 sec
carbon-18, 92e-3 sec
actinium-209, 92e-3 sec
actinium-208, 97e-3 sec
copernicium-284, 98e-3 sec
thorium-214, 100e-3 sec
flerovium-285, 100e-3 sec
protactinium-216, 105e-3 sec
nobelium-260, 106e-3 sec
helium-8, 119e-3 sec
flerovium-286, 120e-3 sec
seaborgium-263m, 120e-3 sec
carbon-9, 126.5e-3 sec
nitrogen-20, 130e-3 sec
thorium-213, 140e-3 sec
moscovium-288, 164e-3 sec
actinium-215, 170e-3 sec
lithium-9, 178.3e-3 sec
copernicium-281, 180e-3 sec
plutonium-237m1, 180e-3 sec
neon-26, 192e-3 sec
carbon-17, 193e-3 sec
mendelevium-247m, 200e-3 sec
seaborgium-261, 200e-3 sec
darmstadtium-279, 210e-3 sec
actinium-211, 213e-3 sec
fermium-243, 231e-3 sec
uranium-226, 269e-3 sec
nitrogen-19, 271e-3 sec
hassium-266m, 280e-3 sec
nobelium-254m, 280e-3 sec
hassium-275, 290e-3 sec
sodium-27, 301e-3 sec
moscovium-289, 330e-3 sec
actinium-210, 350e-3 sec
seaborgium-266, 360e-3 sec
fluorine-24, 390e-3 sec
lawrencium-252, 390e-3 sec
mendelevium-245m, 400e-3 sec
mendelevium-244, 400e-3 sec
meitnerium-274, 440e-3 sec
sodium-20, 447.9e-3 sec
meitnerium-276, 450e-3 sec
flerovium-287, 480e-3 sec
hassium-273, 510e-3 sec
neptunium-227, 510e-3 sec
dubnium-259, 510e-3 sec
lawrencium-253, 580e-3 sec
thorium-223, 600e-3 sec
seaborgium-259, 600e-3 sec
neon-25, 602e-3 sec
nitrogen-18, 622e-3 sec
lawrencium-257, 646e-3 sec
moscovium-290, 650e-3 sec
flerovium-288, 660e-3 sec
dubnium-257m, 670e-3 sec
actinium-213, 731e-3 sec
carbon-16, 747e-3 sec
boron-8, 770e-3 sec
nobelium-251, 780e-3 sec
helium-6, 806.7e-3 sec
lithium-8, 839.9e-3 sec
protactinium-224, 844e-3 sec
bohrium-265, 900e-3 sec
bohrium-266, 900e-3 sec
lutetium-153, 900e-3 sec
nihonium-284, 910e-3 sec
actinium-212, 920e-3 sec
bohrium-264, 970e-3 sec

1 second = 1.85485844e+43 PT

seaborgium-263, 1 sec
mendelevium-246, 1.0 sec
thorium-224, 1.05 sec
sodium-26, 1.077 sec
plutonium-228, 1.1 sec
mendelevium-247, 1.12 sec
curium-246m, 1.12 sec
bohrium-271, 1.2 sec
thorium-215, 1.2 sec
rutherfordium-268, 1.4 sec
hassium-268, 1.42 sec
lawrencium-253m, 1.5 sec
fermium-259, 1.5 sec
dubnium-260, 1.52 sec
dubnium-257, 1.53 sec
fermium-246, 1.54 sec
neon-18, 1.672 sec
nobelium-251m, 1.7 sec
protactinium-225, 1.7 sec
americium-229, 1.8 sec
flerovium-289, 1.9 sec
dubnium-256, 1.9 sec
mendelevium-249m, 1.9 sec
dubnium-258m, 1.9 sec
fermium-250m, 1.92 sec
californium-237, 2.1 sec
fluorine-23, 2.23 sec
oxygen-22, 2.25 sec
nobelium-252, 2.27 sec
rutherfordium-255, 2.3 sec
rutherfordium-262, 2.3 sec
carbon-15, 2.449 sec
rutherfordium-259m, 2.5 sec
flerovium-289, 2.6 sec
nobelium-256, 2.91 sec
rutherfordium-259, 3.2 sec
oxygen-21, 3.42 sec
rutherfordium-261m, 4 sec
rutherfordium-257m, 4.1 sec
lawrencium-258, 4.1 sec
fluorine-21, 4.158 sec
nitrogen-17, 4.173 sec
copernicium-283, 4.2 sec
nihonium-285, 4.2 sec
fermium-245, 4.2 sec
fluorine-22, 4.23 sec
meitnerium-278, 4.5 sec
dubnium-258, 4.5 sec
dubnium-261, 4.5 sec
roentgenium-280, 4.6 sec
rutherfordium-257, 4.7 sec
actinium-222, 5.0 sec
einsteinium-240, 6 sec
lawrencium-259, 6.2 sec
mendelevium-248, 7 sec
nitrogen-16, 7.13 sec
seaborgium-265, 8 sec
actinium-214, 8.2 sec
hassium-270, 9 sec
nihonium-286, 9.5 sec
bohrium-272, 9.8 sec
hassium-271, 10 sec
einsteinium-241, 10 sec
fluorine-20, 11.07 sec
darmstadtium-281, 12.7 sec
lawrencium-254, 13 sec
einsteinium-242, 13.5 sec
oxygen-20, 13.51 sec
beryllium-11, 13.81 sec
hassium-269, 16 sec
seaborgium-265m, 16.2 sec
bohrium-267, 17 sec
roentgenium-281, 17 sec
neon-19, 17.22 sec
berkelium-234, 19 sec
carbon-10, 19.29 sec
einsteinium-243, 21 sec
berkelium-233, 21 sec
berkelium-236, 22 sec
lawrencium-255, 22 sec
sodium-21, 22.49 sec
rutherfordium-266, 23 sec
mendelevium-249, 24 sec
nobelium-257, 25 sec
oxygen-19, 26.464 sec
curium-233, 27 sec
lawrencium-256, 27 sec
copernicium-285, 28 sec
dubnium-263, 29 sec
fermium-247, 31 sec
americium-230, 32 sec
dubnium-262, 35 sec
fermium-248, 35.1 sec
einsteinium-244, 37 sec
neon-23, 37.24 sec
bohrium-274, 40 sec
actinium-234, 44 sec
nobelium-254, 51 sec
curium-234, 52 sec
mendelevium-250, 52 sec
sodium-25, 59.1 sec

1 minute = 60 sec = 1.11291506e+45 PT

californium-239, 60 sec
actinium-235, 60 sec
bohrium-270, 61 sec
neptunium-228, 61.4 sec
actinium-222m, 63 sec
californium-240, 64 sec
fluorine-17, 64.49 sec
rutherfordium-263, 66 sec
uranium-227, 66 sec
einsteinium-245, 66 sec
protactinium-234m, 70 sec
oxygen-14, 70.62 sec
actinium-236, 72 sec
rutherfordium-261, 78 sec
americium-232, 79 sec
seaborgium-267, 84 sec
fermium-249, 96 sec
nobelium-253, 97 sec
roentgenium-282, 100 sec
plutonium-230, 102 sec
protactinium-226, 110 sec
berkelium-252, 110 sec
neptunium-243, 111 sec
actinium-232, 119 sec
protactinium-240, 120 sec
plutonium-229, 120 sec
actinium-230, 122 sec
oxygen-15, 122.24 sec
actinium-223, 126 sec
neptunium-242, 130 sec
protactinium-238, 136 sec
neptunium-244, 137 sec
mendelevium-252, 138 sec
americium-234, 139 sec
seaborgium-271, 140 sec
berkelium-238, 144 sec
actinium-233, 145 sec
lawrencium-260, 160 sec
nobelium-255, 190 sec
americium-233, 190 sec
neon-24, 203 sec
californium-242, 209 sec
americium-236, 220 sec
californium-241, 227 sec
mendelevium-251, 240 sec
neptunium-229, 240 sec
einsteinium-247, 273 sec
berkelium-241, 280 sec
neptunium-230, 280 sec
berkelium-240, 290 sec
thorium-237, 290 sec
curium-235, 300 sec
neptunium-242m, 330 sec
curium-236, 410 sec
berkelium-242, 420 sec
thorium-235, 430 sec
neptunium-240m, 433 sec
actinium-231, 450 sec
einsteinium-246, 460 sec
plutonium-231, 520 sec
protactinium-237, 520 sec
thorium-225, 523 sec
protactinium-236, 550 sec
uranium-228, 550 sec
thorium-238, 560 sec
copper-62, 580.4 sec
americium-235, 590 sec
nitrogen-13, 597.9 sec
berkelium-253, 600 sec
mercury-210, 600 sec
mendelevium-254, 600 sec
californium-243, 640 sec
mendelevium-253, 720 sec
californium-256, 740 sec
neptunium-241, 830 sec
seaborgium-269, 840 sec
free neutron, 881.5 sec
neptunium-232, 880 sec
rutherfordium-263, 900 sec

1 kilosecond = 1 ksec = 1000 sec = 1e+3 sec = 1.85485844e+46 PT

curium-251, 1.01e+3 sec
uranium-242, 1.01e+3 sec
californium-244, 1.16e+3 sec
curium-237, 1.2e+3 sec
carbon-11, 1.2200e+3 sec
plutonium-233, 1.25e+3 sec
thorium-233, 1.310e+3 sec
americium-247, 1.38e+3 sec
uranium-239, 1.407e+3 sec
protactinium-235, 1.466e+3 sec
americium-246m1, 1.50e+3 sec
plutonium-235, 1.52e+3 sec
einsteinium-256, 1.52e+3 sec
americium-244m, 1.6e+3 sec
uranium-235m, 1.6e+3 sec
mendelevium-255, 1.6e+3 sec
einsteinium-248, 1.6e+3 sec
mendelevium-254m, 1.7e+3 sec
fermium-250, 1.82e+3 sec
thorium-226, 1.834e+3 sec
plutonium-232, 2.02e+3 sec
neptunium-233, 2.17e+3 sec
thorium-236, 2.25e+3 sec
protactinium-227, 2.30e+3 sec
americium-246, 2.3e+3 sec
lawrencium-261, 2.6e+3 sec
californium-245, 2.70e+3 sec
neptunium-231, 2.93e+3 sec
berkelium-251, 3.34e+3 sec
mendelevium-258m, 3.42e+3 sec
uranium-229, 3.5e+3 sec
nobelium-259, 3.5e+3 sec

1 hour = 1 h = 3600 sec = 6.67749038e+46 PT

dubnium-270, 3.6e+3 sec
neptunium-240, 3.72e+3 sec
actinium-229, 3.76e+3 sec
curium-249, 3.849e+3 sec
gallium-68, 4.063e+3 sec
americium-237, 4.4e+3 sec
mendelevium-256, 4.62e+3 sec
rutherfordium-267, 4.7e+3 sec
dubnium-266, 4.8e+3 sec
californium-255, 5.10e+3 sec
mendelevium-259, 5.8e+3 sec
americium-238, 5.9e+3 sec
einsteinium-249, 6.13e+3 sec
protactinium-239, 6.5e+3 sec
fluorine-18, 6.586e+3 sec
americium-245, 7.4e+3 sec
einsteinium-250m, 8.0e+3 sec
curium-238, 8.6e+3 sec
curium-239, 9.0e+3 sec
fermium-256, 9.46e+3 sec
actinium-224, 10.0e+3 sec
californium-247, 11.2e+3 sec
berkelium-250, 11.56e+3 sec
fermium-254, 11.66e+3 sec
lawrencium-262, 13e+3 sec
berkelium-244, 15.7e+3 sec
berkelium-243, 16e+3 sec
dubnium-267, 17e+3 sec
plutonium-243, 17.84e+3 sec
fermium-251, 19.1e+3 sec
mendelevium-257, 19.9e+3 sec
actinium-228, 22.1e+3 sec
protactinium-234, 24.1e+3 sec
einsteinium-256m, 27e+3 sec
einsteinium-250, 31e+3 sec
plutonium-234, 32e+3 sec
americium-244, 36e+3 sec
erbium-165, 37.3e+3 sec
plutonium-245, 38e+3 sec
lawrencium-266, 40e+3 sec
americium-239, 43e+3 sec
uranium-240, 51e+3 sec
sodium-24, 53.9e+3 sec
americium-242, 57.7e+3 sec
fermium-255, 72.3e+3 sec
protactinium-228, 79e+3 sec
neptunium-236m, 81e+3 sec
berkelium-248m, 85e+3 sec

1 (mean solar) day = 1 d = 86400 sec = 1.60259769e+48 PT

fermium-252, 91.4e+3 sec
thorium-231, 91.88e+3 sec
dubnium-268, 110.9e+3 sec
erbium-160, 102.9e+3 sec
actinium-226, 105.74e+3 sec
protactinium-232, 113e+3 sec
einsteinium-251, 118.8e+3 sec
californium-246, 128.52e+3 sec
protactinium-229, 130e+3 sec
einsteinium-255, 141.48e+3 sec
berkelium-246, 156e+3 sec
neptunium-238, 182.9e+3 sec
americium-240, 182.9e+3 sec
plutonium-247, 196e+3 sec
neptunium-239, 203.6e+3 sec
gold-198, 232.8e+3 sec
fermium-253, 259e+3 sec
gold-199, 273.8e+3 sec
radon-222, 330.35e+3 sec
uranium-231, 360e+3 sec
neptunium-234, 380e+3 sec
calcium-47, 391.9e+3 sec
berkelium-245, 427e+3 sec
manganese-52, 483.1e+3 sec
gold-196, 534.2e+3 sec
uranium-237, 583e+3 sec

1 week = 604800 sec = 1.12181838e+49 PT

einsteinium-257, 670e+3 sec
iodine-131, 693e+3 sec
thulium-167, 799e+3 sec
actinium-225, 860e+3 sec
plutonium-246, 937e+3 sec

1 megasecond = 1 Msec = 1,000,000 sec = 1e+6 sec = 1.85485844e+49 PT

phosphorus-32, 1.235e+6 sec
vanadium-48, 1.38011e+6 sec
protactinium-230, 1.50e+6 sec
californium-253, 1.539e+6 sec
thorium-227, 1.614e+6 sec
einsteinium-253, 1.769e+6 sec
uranium-230, 1.80e+6 sec
thorium-234, 2.082e+6 sec
protactinium-233, 2.3306e+6 sec
curium-240, 2.3e+6 sec
chromium-51, 2.39350e+6 sec
mendelevium-260, 2.40e+6 sec
curium-241, 2.83e+6 sec
einsteinium-255, 3.44e+6 sec
plutonium-237, 3.91e+6 sec
mendelevium-258, 4.45e+6 sec
beryllium-7, 4.590e+6 sec
californium-254, 5.23e+6 sec
cobalt-56, 6.676e+6 sec
scandium-46, 7.239e+6 sec
sulfur-35, 7.544e+6 sec
thulium-168, 8.04e+6 sec
fermium-257, 8.68e+6 sec
thulium-170, 11.11e+6 sec
polonium-210, 11.9e+6 sec
calcium-45, 14.06e+6 sec
curium-242, 14.07e+6 sec
gold-195, 16.08e+6 sec
zinc-65, 21.06e+6 sec
cobalt-57, 23.483e+6 sec
einsteinium-254, 23.82e+6 sec
vanadium-49, 29e+6 sec
berkelium-249, 29e+6 sec
californium-248, 28.81e+6 sec

1 (Julian) year = 1 y = 31,557,600 sec = 5.85348807e+50 PT

ruthenium-106, 32.3e+6 sec
neptunium-235, 34.22e+6 sec
cadmium-109, 40.0e+6 sec
einsteinium-252, 40.76e+6 sec
thorium-228, 60.33e+6 sec
thulium-171, 61e+6 sec
caesium-134, 65.17e+6 sec
sodium-22, 82.1e+6 sec
californium-252, 83.5e+6 sec
iron-55, 87.0e+6 sec
plutonium-236, 90.2e+6 sec
rhodium-101, 100e+6 sec
cobalt-60, 166.35e+6 sec
krypton-85, 339.4e+6 sec
hydrogen-3, 389e+6 sec
californium-250, 413e+6 sec
plutonium-241, 451.0e+6 sec
niobium-93m, 509e+6 sec
curium-244, 571e+6 sec
actinium-227, 687.1e+6 sec
strontium-90, 909e+6 sec
curium-243, 920e+6 sec
caesium-137, 952e+6 sec

1 gigasecond = 1 Gsec = 1e+9 sec = 1.85485844e+52 PT

titanium-44, 2.0e+9 sec
uranium-232, 2.17e+9 sec
plutonium-238, 2.77e+9 sec
samarium-151, 3.05e+9 sec
nickel-63, 3.16e+9 sec
americium-242m1, 4.4e+9 sec
silicon-32, 5.4e+9 sec
argon-39, 8.5e+9 sec
berkelium-248, >9.5e+9 sec
californium-249, 11.1e+9 sec
silver-108m, 13.2e+9 sec
americium-241, 13.64e+9 sec
mercury-194, 14.0e+9 sec
niobium-91, 21e+9 sec
californium-251, 28e+9 sec
holmium-166m1, 38e+9 sec
berkelium-247, 44e+9 sec
radium-226, 50e+9 sec
molybdenum-93, 130e+9 sec
holmium-163, 144e+9 sec
curium-246, 150e+9 sec
carbon-14, 181e+9 sec
plutonium-240, 207.0e+9 sec
thorium-229, 232e+9 sec
americium-243, 233e+9 sec
curium-250, 260e+9 sec
curium-245, 270e+9 sec
niobium-94, 640e+9 sec
plutonium-239, 761e+9 sec

1 terasecond = 1 Tsec = 1e+12 sec = 1.85485844e+55 PT

protactinium-231, 1.034e+12 sec
lead-202, 1.66e+12 sec
lanthanum-137, 1.9e+12 sec
thorium-230, 2.379e+12 sec
nickel-59, 2.4e+12 sec
calcium-41, 3.3e+12 sec
neptunium-236, 4.9e+12 sec
uranium-233, 5.02e+12 sec
rhenium-186m, 6.3e+12 sec
technetium-99, 6.66e+12 sec
krypton-81, 7.2e+12 sec
tin-126, 7.3e+12 sec
uranium-234, 7.75e+12 sec
chlorine-36, 9.5e+12 sec
curium-248, 11.0e+12 sec
bismuth-208, 11.6e+12 sec
plutonium-242, 11.8e+12 sec
aluminium-26, 22.6e+12 sec
selenium-79, 36e+12 sec
beryllium-10, 48e+12 sec
zirconium-93, 48e+12 sec
gadolinium-150, 56e+12 sec
neptunium-237, 67.7e+12 sec
caesium-135, 73e+12 sec
iron-60, 82e+12 sec
technetium-97, 82e+12 sec
dysprosium-154, 95e+12 sec
bismuth-210m, 96e+12 sec
manganese-53, 120e+12 sec
technetium-98, 130e+12 sec
palladium-107, 210e+12 sec
hafnium-182, 280e+12 sec
lead-205, 550e+12 sec
curium-247, 490e+12 sec
iodine-129, 500e+12 sec
uranium-236, 739e+12 sec

1 petasecond = 1 Psec = 1e+15 sec = 1.85485844e+58 PT

niobium-92, 1.10e+15 sec
samarium-146, 2.1e+15 sec
plutonium-244, 2.5e+15 sec
uranium-235, 22.2e+15 sec
potassium-40, 40.3e+15 sec
uranium-238, 141.0e+15 sec
thorium-232, 443e+15 sec

Current age of the universe = 4.345e+17 sec = 8.060e+60 PT

exasecond = 1e+18 sec = 1.85485844e+61 PT

lutetium-176, 1.21e+18 sec
rhenium-187, 1.3002e+18 sec
rubidium-87, 1.554e+18 sec
lanthanum-138, 3.2e+18 sec
samarium-147, 3.3e+18 sec
platinum-190, 20.51e+18 sec

zettasecond = 1e+21 sec = 1.85485844e+64 PT

gadolinium-152, 3.4e+21 sec
indium-115, 13.9e+21 sec
hafnium-174, 63e+21 sec
osmium-186, 63e+21 sec
neodymium-144, 72e+21 sec
samarium-148, 220e+21 sec
cadmium-113, 240e+21 sec

yottasecond = 1e+24 sec = 1.85485844e+67 PT

vanadium-50, 4.4±1.3 e+24 sec
tungsten-180, 56.8±6.3 e+24 sec
europium-151, 160e+24 sec
neodymium-150, 210e+24 sec
molybdenum-100, 270e+24 sec
bismuth-209, 600±63 e+24 sec
zirconium-96, 630e+24 sec
cadmium-116, 980±130 e+24 sec

1e+27 seconds = 1.85485844e+70 PT

calcium-48, 1.4e+27 sec
selenium-82, 3.1e+27 sec
tellurium-130, 25e+27 sec
barium-130, 50e+27 sec
germanium-76, 57e+27 sec
xenon-136, 75e+27 sec
krypton-78, 290e+27 sec
xenon-124, 570e+27 sec

1e+30 seconds = 1.85485844e+73 PT

tellurium-128, 69.4±9.5 e+30 sec

Reference: Wikipedia, https://en.wikipedia.org/wiki/List_of_radioactive_nuclides_by_half-life
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