ADOPTED LEVELS for 227Np
Author: Ictp-2014 Workshop Group | Citation: Nucl. Data Sheets 132, 257 (2016) | Cutoff date: 15-Jan-2016
Author: B. Singh | Citation: ENSDF | Cutoff date: 15-JAN-2016
Full ENSDF file | Adopted Levels (PDF version)
| S(n)= 8290 keV SY | S(p)= 2060 keV 70 | Q(α)= 7816 keV 14 | |||
| Reference: 2012WA38 |
| E(level) (keV) | T1/2(level) |
| 0 | 0.51 s 6 % α = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 0.51 s 6 % α = 100 | %ε+%β+≈0.7, theory (1997Mo25). E(level): %ε+%β+≈0.7, theory (1997Mo25). |
227Np evaluated by B. Singh.
1990Ni05: 227Np activity was produced in 209Bi(22Ne,4n) reaction at E=121 MeV, and identified by mass separation and by detection of α particles with Eα=8010 keV from daughter nucleus 223Pa. No spontaneous fission activity was observed. Measured Eα using a semiconductor detector
1990An19: 227Np activity was produced in 209Bi(22Ne,4n) reaction at E=106-115 MeV, and identified by detection of α particles with Eα=8.00 15 MeV and Eα=8.20 15 MeV from 223Pa, its daughter nucleus. Measured Eα using a semiconductor detector. See also 1994Ye08
α spontaneous fission activity with half-life of 60 s 5 reported by 1966Ku13, and 51 s 15 by 1976SoZT (also 1978SoZZ), previously assigned to 228Np or 227Np, probably belongs to 228Np.
Q-value: Estimated uncertainty=110 for S(n) (2012Wa38)
Q-value: S(2n)=15170 100, S(2p)=6360 100 (2012Wa38)