ADOPTED LEVELS, GAMMAS for 53Ca
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 28-MAY-2021
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 04-APR-2019
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 10-FEB-2014
Author: Huo Junde | Citation: Nucl. Data Sheets 110,2689 (2009) | Cutoff date: 31-Mar-2007
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=9380 keV 50 | S(n)= 3190 keV 40 | S(p)= 19540 keV 60 | Q(α)= -14750 keV SY | ||
| Reference: 2021WA16 |
| References: | |||
| A | 53K β- decay (30 MS) | B | 1H(54Ca,pnγ) |
| C | 9Be(55Sc,53CaG) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) |
| 0 | AB | (1/2-) | 461 ms 90 % β- = 100 % β-n = 40 10 | ||
| 1746 15 | BC | (5/2-) | 1746 15 | 100 | |
| 2220 1 | ABC | (3/2-) | 2220 1 | 100 |
E(level): From Eγ values.
Jπ(level): From L-transfers (L=1 for g.s. and 2220 level, and L=3 for 1746 level), and orbital assignments from parallel-momentum distributions in 1H(54Ca,pnγ), combined with shell-model calculations (2019Ch43)
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (1/2-) | 461 ms 90 % β- = 100 % β-n = 40 10 | 1983La23 stated that %β-n value for 53Ca should be considered as a lower limit since %β-2n decay of 53K was neglected. But from 2006Pe16, measured %β-2n≈10 5 for 53K decay. This value implies that %β-n=40 10 from 1983La23 is reasonable within the quoted uncertainty. |
| 1746 | (5/2-) | XREF: B(1738)C(1753). | |
| 2220 | (3/2-) | XREF: B(2220)C(2227). |
| E(level) | E(gamma) | Comments |
| 1746 | 1746 | E(γ): weighted average of 1738 17 in 1H(54Ca,pnγ) and 1753 15 in 9Be(55Sc,53Caγ) |
| 2220 | 2220 | E(γ): from 53K β- decay |
1983La23: 53Ca identified from 53K decay, the latter formed in Ir(p,X),E=10 GeV reaction; measured half-life of 53Ca activity
2008Ma01: 53Ca produced in fragmentation of E=140 MeV/nucleon 76Ge beam provided by the NSCL-MSU facility. Isotopes separated with A1900 fragment separator. Time-of-flight technique. Measured β particles using Beta Counting System of three Si PIN detectors, a double-sided silicon strip detector and six single sided silicon strip detectors. Detected γ rays using 16 Ge detectors of the Segmented Germanium array. Measured half-life of 53Ca by fitting the decay curves to a function which included decay of the parent, growth and decay of daughter and a constant background. No gamma rays were seen in correlation with β rays.
2010Cr02 (also 2009Cr03): 53Ca produced in fragmentation of E=130 MeV/nucleon 76Ge beam provided by the NSCL cyclotrons K500 and K1200 at NSCL. Isotopes separated with A1900 fragment separator. Time-of-flight technique. Measured β particles using NSCL Beta Counting System of three Si PIN detectors, a double-sided silicon strip detector and six single sided silicon strip detectors. Detected prompt and delayed γ rays in coin with fragments using 16 Ge detectors of the Segmented Germanium array. Measured half-life of 53Ca by fitting the decay curve of (53Ca)β(2109γ) correlated events.
2013Wi06: measured precise mass excess=-29388 keV 43
2020Bh06: shell-model calculations of calculated level energies, Jπ, B(E2), nuclear magnetic moments, and spectroscopic factors
Theory references: consult the NSR database at www.nndc.bnl.gov/nsr/ for 32 references sealing with nuclear structure, β decay and other topics.
Q-value: Estimated uncertainty=400 keV in Q(α) (2021Wa16)
Q-value: Q(β-n)=3060 40, S(2n)=9200 40, S(2p)=37480 400 (syst) (2021Wa16).