ADOPTED LEVELS for 104Sr
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 31-MAY-2015
Author: Jean Blachot | Citation: Nucl. Data Sheets 108,2035 (2007) | Cutoff date: 30-Mar-2007
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=9960 keV SY | S(n)= 4760 keV SY | S(p)= 17790 keV SY | Q(α)= -11480 keV SY | ||
| Reference: 2012WA38 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0 | 0+ | 53 ms 5 % β- = 100 % β-n = ? % β-2n = ? |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 0+ | 53 ms 5 % β- = 100 % β-n = ? % β-2n = ? | Measured σ=15 pb (2010Oh02), systematic uncertainty≈40%. Probability of misidentification of 106Sr isotope<0.001% (2010Oh02). |
1997Be70, 1995CzZZ: 104Sr produced in Pb(238U,F), E=750 MeV/nucleon identification by time-of-flight.
2011Ni01: 104Sr nuclide produced in Be(238U,F) reactions at E=345 MeV/nucleon produced by the cascade operation of the RBIF-RIKEN accelerator complex. Target=550 mg/cm2. Identification of 105Sr made on the basis of magnetic rigidity, time-of-flight and energy loss. The separated nuclei were implanted in a nine-layer double-sided silicon-strip detector (DSSSD). Correlations were recorded between the heavy ions and β rays. The half-life of 104Sr isotope was measured from the correlated ion-β decay curves and maximum likelihood analysis technique. In the analysis of the decay curve, β-detection efficiency, background rate, daughter and granddaughter (including those populated in delayed neutron decays) half-lives, and β-delayed neutron emission probabilities were considered. Comparison of measured half-lives with FRDM+QRPA and KTUY+GT2 calculations
2015Lo04: 104Sr 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 104Sr 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 104Sr 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
Theoretical calculations:
2013Fa05: calculated half-lives, delayed neutron emission probabilities
2009Ch42: calculated yrast spectra, B(E2), quadrupole deformation
2002Xu02: calculated levels, deformations, possible isomeric states
1985Ca33: calculated levels, B(E2) ratios
1979Bu20: calculated potential energy surfaces; deduced ground-state equilibrium deformation
Q-value: Estimated uncertainties (2012Wa38): 500 for Q(β-), S(p) and Q(α), 360 for S(n).
Q-value: S(2n)=7890 310, Q(β-n)=6280 300 (syst,2012Wa38). S(2p)=33090 (theory,1997Mo25)