ADOPTED LEVELS, GAMMAS for 48Fe
Author: Jun Chen | Citation: Nucl. Data Sheets 179, 1 (2022) | Cutoff date: 30-Nov-2021
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-19740 keV SY | S(n)= 18950 keV SY | S(p)= 2.73×103 keV 10 | Q(α)= -7.01×103 keV 11 | ||
Reference: 2021WA16 |
References: | |||
A | 49Ni εp decay | B | 9Be(49Fe,xγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
0.0 | AB | 0+ | 45.5 ms 8 % ε = 100 % εp = 15.3 8 | ||||
969.5 5 | AB | (2+) | 969.5 5 | 100 | 0.0 | 0+ | |
2253.5 11 ? | B | (4+) | 1284 1 | 100 | 969.5 | (2+) | |
2377 3 ? | B | (2+) | 1407 3 | 100 | 969.5 | (2+) | |
3197.5 23 ? | B | (4+) | 944 2 ? | 100 | 2253.5 | (4+) | |
3241.5 21 ? | B | (6+) | 988 3 | 100 | 2253.5 | (4+) | |
3475 5 ? | B | (3-) | 2505 5 | 100 | 969.5 | (2+) | |
3497.5 20 ? | B | (6+) | 256 1 1244 2 | 100 16 79 16 | 3241.5 2253.5 | (6+) (4+) | |
4205 4 ? | B | (5-) | 1951 4 ? | 100 | 2253.5 | (4+) |
E(level): From a least-squares fit to γ-ray energies
Jπ(level): Proposed in 2021Ya33 in (49Fe,Xγ) based on comparions with mirror nucleus 48Ti and shell-model predictions
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 45.5 ms 8 % ε = 100 % εp = 15.3 8 | %εp: weighted average of 14.4 7 (2016Or03) and 15.9 6 (2007Do17). Other: >3.6 11 for E(p)=959 keV 33 (1996Fa09). E(level): %εp: weighted average of 14.4 7 (2016Or03) and 15.9 6 (2007Do17). Other: >3.6 11 for E(p)=959 keV 33 (1996Fa09). |
E(level) | E(gamma) | Comments |
969.5 | 969.5 | E(γ): from 2007Do17. Other: 971 1 from (49Fe,Xγ) (2021Ya33) |
Mass measurement:
2020Fu05: measured mass excess=-18009 keV 92 at the HIRFL-CSR acceleration complex at Lanzhou, using the isochronous mass spectrometry (IMS) with the experimental cooler storage ring (CSRe).
Other measurements:
2016Or03: 48Fe was produced in fragmentation of 74.5 MeV/nucleon 58Ni beam on a 200 μm thick natural Ni target at LISE3-GANIL facility. Fragments were selected by LISE3 separator and implanted into a double-sided silicon strip detector (DSSSD), surrounded by four EXOGAM Ge clovers for γ ray detection. Implantations were identified by energy loss ΔE and time-of-flight (tof) information. Measured Ep, Ip, 48Fe half-life, delayed proton decay branches.
1996Fa09: 9Be(58Ni,X) E=650 MeV/nucleon. Measured projectile-like fragments at 0|’, fragment recoil separator; mag spect, ΔE/E counter telescope (Si), tof).
Others: 2016Bl05, 2002Pf03, 1994Bl10, 1993Bu04, 1987Po04
Consult Nuclear Science References for theoretical studies.
Level scheme is tentatively proposed by 2021Ya33 based on comparisons with that of the mirror nucleus 48Ti
Q-value: ΔQ(β-)=510, ΔS(n)=510 (syst,2021Wa16)
Q-value: S(2n)=35360 310 (syst), S(2p)=3110 90, Q(ε)=11290 90, Q(εp)=9270 90 (2021Wa16)