ADOPTED LEVELS, GAMMAS for 108Nb
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 20-Jul-2015
Author: Jean Blachot | Citation: ENSDF | Cutoff date: 1-Jul-2008
Author: Jean Blachot | Citation: Nucl. Data Sheets 91, 135 (2000) | Cutoff date: 1-Jun-2000
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=11216 keV 13 | S(n)= 3897 keV 12 | S(p)= 12570 keV SY | Q(α)= 7910 keV SY | ||
| Reference: 2012WA38 |
| References: | |||
| A | 108Zr β- decay (77.4 MS) | B | 108Nb IT decay (0.109 μs) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | AB | (2+) | 198 ms 6 % β- = 100 % β-2n = ? % β-n = 6.3 5 | |||||
| 64.3 5 | B | 64.3 5 | 100 | 0.0 | (2+) | |||
| 77.6 5 | B | 14S 77.6 5 | 100 2 | D | 64.3 0.0 | (2+) | ||
| 166.6 5 | B | (4-,5) | 0.109 µs 2 % IT = 100 | 89.0 5 102.2 5 | 100.0 18 33.9 18 | (E2) | 77.6 64.3 | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 166.6 | (4-,5) | 0.109 µs 2 % IT = 100 | 89.0 5 | (E2) | 1.77 | α=1.77 4 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (2+) | 198 ms 6 % β- = 100 % β-2n = ? % β-n = 6.3 5 | Theoretical T1/2=307 ms, %β-n=16.6, %β-2n=0.0 (2003Mo09). |
1994Be24: 108Nb produced and identified in Pb(238U,f), E=750 MeV/nucleon, followed by on-line mass separation and time-of-flight method at GSI facility
1996Pe25, 1996Me09: 108Nb produced in U(p,F),E=50 MeV in 1996Pe25 and E=25,30 MeV in 1996Me09; measured T1/2, β-n probability.
2009Pe06: 108Nb formed by fragmentation of 120 MeV/nucleon 136Xe beam from NSCL facility using Coupled Cyclotrons and A1900 fragment separator. The time-of-flight and transversal positions of each particle was measured using two plastic scintillators. The ΔE energy loss in a Si PIN detector was measured which, when combined with time-of-flight (tof) and transversal position measurements, allowed for an event-by-event identification of the transmitted nuclei. Transmitted nuclei and their β decays were measured using the β counting system consisting of four Si PIN detectors and a double-sided Si strip detector. β-delayed neutrons were measured in coincidence with β-decay precursor using neutron emission ratio observer (NERO) detector consisting of 60 proportional gas counter tubes embedded in polyethylene moderator matrix. The γ rays were measured with SeGA Ge detectors. Measured isotopic half-lives and delayed neutron emission probabilities Isotopic half-life was measured by 2009Pe06 from least-squares fit and maximum likelihood method of time differences of implantations and correlated β decay events.
2015Lo04: 108Nb nuclide produced at RIBF-RIKEN facility in 9Be(238U,F) reaction at E=345 MeV/nucleon with an average intensity of 6×1010 ions/s. Identification of 108Nb was made by determining atomic Z and mass-to-charge ratio α/Q, where Q=charge state of the ions. The selectivity of ions was based on magnetic rigidity, time-of-flight and energy loss. The separated nuclei were implanted at a rate of 50 ions/s in a stack of eight double-sided silicon-strip detector (WAS3ABi), surrounded by EURICA array of 84 HPGe detectors. Correlations were recorded between the implanted ions and β rays. The half-life of 108Nb isotope was measured from the correlated ion-β decay curves and maximum likelihood analysis technique as described in 2014Xu07. Comparison of measured half-lives with FRDM+QRPA, KTUY+GT2 and DF3+CQRPA theoretical calculations
Mass measurement: 2011Ha48
Q-value: Estimated uncertainties (2012Wa38): 300 for S(p), 400 for Q(α)
Q-value: Q(β-)n=4941 13, S(2n)=9489 9, S(2p)=28070 500 (syst) (2012Wa38)