39-yttrium-99

Atomic Mass: 98.9246347 +- 0.0000262 amu
Excess Mass: -70202.280 +- 24.392 keV
Binding Energy: 838751.456 +- 24.392 keV
Beta Decay Energy: B- 7567.133 +- 13.985 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: 1.470 s
Mode of decay: Beta to Zr-99
- Decay energy: 7.567 MeV
Mode of decay: Beta + Neutron to Zr-98
- Branch ratio: 1.90 %
- Decay energy: 3.000 MeV
Meta state at 2.141 Mev
Spin: 17/2+)
Half life: 8.6 us
Mode of decay: IT
- Decay energy: 2.142 MeV
Possible parent nuclides:
Beta from Sr-99
Beta + N from Sr-100

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)