93-Np-237
basic
n-XS summary
XS graphs
element
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93-neptunium-237
- Atomic Mass: 237.0481673 +- 0.0000021 amu
- Excess Mass: 44867.501 +- 1.961 keV
- Binding Energy: 1795277.138 +- 1.986 keV
- Beta Decay Energy: B- -220.318 +- 1.298 keV
"The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra,
Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.
- Spin: 5/2+
- Half life: 2144000 years
- Mode of decay: Alpha to Pa-233
- Mode of decay: SF
Meta state at 2.800 Mev
- Half life: 45 ns
- Mode of decay: SF
- Branch ratio: <=100.00 %
- Decay energy: 0 0.000 MeV
- Possible parent nuclides:
- Beta from U-237
- Electron capture from Pu-237
- Alpha from Am-241
R.R.Kinsey, et al.,The NUDAT/PCNUDAT Program for Nuclear Data,paper submitted to the 9 th International Symposium of Capture-Gamma_raySpectroscopy and Related Topics, Budapest, Hungary, Octover 1996.Data extracted from NUDAT database (Jan. 14/1999)
Magnetic Dipole Moments and Electric Quadrupole Moments
Ex(kev) | T1/2 | Spin | | m(nm) | | Q(b) | | Ref. Std. | Method | Reference |
0 | 2.1x10*6y | 5/2+ | | +3.14(4) | | | | | "EPR, R" | JCP 53 809 (70) |
| | | | +~2.9 | | | | | ME | PR 165 1319 (68) |
| | | | | | +3.866(6) a | | | "Mu-X, Pi-X, ME" | PL 189B 7 (87)/PR 186 1296 (69) |
60 | 68 ns | 5/2- | | +1.68(3) | | | | [237Np] | ME | PR 171 316 (68)/JCP 53 809 (70) |
| | | | +1.95(15) | | | | | TDPAC | NP A104 588 (67) |
| | | | | | +3.85(4) | | [237Np] | ME | BAPS 13 28 (68) |
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N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published. 2000 Courtesy of T. Burrows at BNL/NNDC.
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