ADOPTED LEVELS, GAMMAS for 56Sc
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 25-Mar-2022
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 31-OCT-2011
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 10-MAY-2009
Authors: Huo Junde, Huo Su, Yang Dong | Citation: Nucl. Data Sheets 112, 1513 (2011) | Cutoff date: 29-Oct-2009
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1391×101 keV 28 | S(n)= 275×101 keV 27 | S(p)= 1415×101 keV 31 | Q(α)= -1080×101 keV 26 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 56Sc IT decay (0.29 μs) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | A | (1+) | 26 ms 6 % β- = 100 % β-n = ? % β-2n = ? | |||||
| 0+X | (5+,6+) | 75 ms 6 % β- = 100 % β-2n = ? % β-n > 14 2 | ||||||
| 587.2 3 | A | (2+) | 587.3 3 | 100 | 0.0 | (1+) | ||
| 727.5 3 | A | (3+) | 140.5 3 727.3 4 | 100 25 59 10 | 587.2 0.0 | (2+) (1+) | ||
| 775.1 4 | A | (4+) | 0.29 µs 2 % IT = 100 | 47.7 3 187.8 3 | 100 27 70 19 | (M1) (E2) | 727.5 587.2 | (3+) (2+) |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 775.1 | (4+) | 0.29 µs 2 % IT = 100 | 47.7 3 | (M1) | 0.115 | B(M1)(W.u.)=0.00038 7, α=0.115 |
| (4+) | 0.29 µs 2 % IT = 100 | 187.8 3 | (E2) | 0.0263 | B(E2)(W.u.)=0.26 6, α=0.0263 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (1+) | 26 ms 6 % β- = 100 % β-n = ? % β-2n = ? | Theoretical T1/2=16.2 ms, %β-n=10, %β-2n=0 (2019Mo01). E(level): Theoretical T1/2=16.2 ms, %β-n=10, %β-2n=0 (2019Mo01). |
| 0+X | (5+,6+) | 75 ms 6 % β- = 100 % β-2n = ? % β-n > 14 2 | Observation of 591.7 3 (Iγ=14% 2) and 1203.5 3 (Iγ=8% 1) γ rays from the decay of longer-live activity of 56Sc to 55Ti confirms β-delayed-neutron decay of 75-ms activity of 56Sc (2010Cr02). Authors give %β-n|>14 2, probably considering other possible delayed β-delayed-neutron branches. This value is in approximate agreement with theoretical %β-n=10 from 2019Mo01 for the ground state decay. E(level): Observation of 591.7 3 (Iγ=14% 2) and 1203.5 3 (Iγ=8% 1) γ rays from the decay of longer-live activity of 56Sc to 55Ti confirms β-delayed-neutron decay of 75-ms activity of 56Sc (2010Cr02). Authors give %β-n|>14 2, probably considering other possible delayed β-delayed-neutron branches. This value is in approximate agreement with theoretical %β-n=10 from 2019Mo01 for the ground state decay. |
| 587.2 | (2+) | Jπ(level): Tentative assignments based on (1+) for g.s. and E2 assignment to 187.8γ (2010Cr02). | |
| 727.5 | (3+) | Jπ(level): Tentative assignments based on (1+) for g.s. and E2 assignment to 187.8γ (2010Cr02). | |
| 775.1 | (4+) | 0.29 µs 2 % IT = 100 | Jπ(level): Tentative assignments based on (1+) for g.s. and E2 assignment to 187.8γ (2010Cr02). |
| E(level) | E(gamma) | Comments |
| 775.1 | 187.8 | M(γ): from Weisskopf estimates (2010Cr02) |
1997Be70: 56Sc identified in 9Be(238U,F), E=750 MeV/nucleon, fragments separator (FRS) at GSI facility, identification by time-of-flight. Measured production cross section of 50 nb from 68 counts assigned to 56Sc
2004Li12: 56Sc produced in 9Be(86Kr,X) fragmentation reaction. Measured Eγ, Iγ, γγ, βγ, βγ(t) using a double-sided strip detector. Identity of particle from energy loss and time of flight from a PIN detector, the NSCL β calorimeter, and scintillator.
2004Li75 (also 2004Li12,2004Li72,2005Ma93): 56Sc isotope produced in 9Be(86Kr34+,X) fragmentation reaction at E=140 MeV/nucleon; A1900 fragment separator. Measured Eγ, Iγ, γγ, βγ, βγ(t), lifetime using a double-sided Si microstrip detector (DSSD) and the MSU segmented Germanium Array (SeGA). Identity of particle from energy loss and time of flight from a PIN detector, the NSCL β calorimeter, and scintillator. The SeGA array was arranged around the β counting system and comprised twelve Ge detectors. In the mixed (26 ms+75 ms) activity, 2004Li75 estimated 83% 11 contribution from low-spin isomer and 20% 4 from the high-spin isomer, based on absolute γ-ray intensities and deduced β feeding to the 56Ti g.s. Comparison theoretical calculations using shell model and pf model space
2008Ma01 (also 2005Ma93): 56Sc isotope produced in 9Be(76Ge,X) reaction at E=140 MeV/nucleon 76Ge beam provided by NSCL at Michigan State University. Isotopes separated with A1900 fragment separator. Time-of-flight technique.
2010Cr02: E=130 MeV/nucleon 76Ge30+ beam provided by the K500 and K1200 cyclotrons at NSCL at Michigan State University. Isotopes separated with A1900 fragment separator. Time-of-flight technique. Fully stripped secondary fragments were sent to NSCL Beta Counting System (BCS). 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 56Sc by fitting the decay curves to a single exponential function with a constant background. Also measured delayed- neutron decay probability
Mass measurements: 2020Mi13, 2020Me06, 2015Me08
Theoretical calculations: three reference extracted from the NSR database (www.nndc.bnl.gov/nsr/), listed here under document records.
No level-scheme information is available from β- decay of 56Ca
ALl data are from 56Sc IT decay dataset
Q-value: Q(β-n)=8250 260, S(2n)=7220 260, S(2p)=34940 480 (syst) (2021Wa16)
Q-value: Q(β-2n)=4080 260 deduced by evaluator from relevant mass excesses in 2021Wa16