ADOPTED LEVELS, GAMMAS for 55Ni
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 30-Apr-2022
Author: Huo Junde | Citation: Nucl. Data Sheets 109, 787 (2008) | Cutoff date: 30-Apr-2007
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-1.370×104 keV 16 | S(n)= 14129 keV 5 | S(p)= 4614.9 keV 7 | Q(α)= -7571.7 keV 16 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 55Cu ε decay (55.9 MS) | B | 56Zn εp decay (32.9 MS) |
| C | 1H(55Co,n) | D | 1H(56Ni,d) |
| E | 9Be(56Ni,55NiG) | F | 28Si(36Ar,2αnγ) |
| G | 58Ni(3He,6He) | H | Coulomb Excitation |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 0.0 | ABCDEFGH | 7/2- | 203.7 ms 20 % ε = 100 | ||||
| 2085.4 4 | A DE G | 3/2- | 2085.6 5 | 100 | 0.0 | 7/2- | |
| 2465.5 4 | A E G | (3/2-) | 379.6 1 2465.3 5 | 0 3.7 4 100.0 12 | 2085.4 0.0 | 3/2- 7/2- | |
| 2587 1 | A E | (5/2-) | 2586.9 5 | 100 | 0.0 | 7/2- | |
| 2802.0 4 | A | (1/2-) | 336.7 5 716.5 5 | 97 4 100 4 | 2465.5 2085.4 | (3/2-) 3/2- | |
| 2842 8 | E G | 2842 8 | | 0.0 | 7/2- | ||
| 2882.1 20 | EFGH | (11/2)- | 2882 2 | | 0.0 | 7/2- | |
| 3182.7 4 | A | (5/2-) | 716.5 5 3182.5 5 | 62 5 100 6 | 2465.5 0.0 | (3/2-) 7/2- | |
| 3186 4 | DE G | 1/2+ | 720 4 1099 4 | | 2465.5 2085.4 | (3/2-) 3/2- | |
| 3214.1 7 | A E | (1/2-) | 748.5 10 1128.6 10 | 100 9 82 14 | 2465.5 2085.4 | (3/2-) 3/2- | |
| 3502 15 | G | ||||||
| 3583.1 23 | BC F | (13/2-) | 701 1 | | 2882.1 | (11/2)- | |
| 3593.7 6 | A G | (5/2-) | 1128.6 1 3593.5 1 | 0 47 10 0 100 10 | 2465.5 0.0 | (3/2-) 7/2- | |
| 3617.1 23 | F | (15/2-) | 735 1 | | 2882.1 | (11/2)- | |
| 3759 4 | DE G | (3/2)+ | 1293 4 | | 2465.5 | (3/2-) | |
| 3784 15 | G | ||||||
| 3808.3 8 | A | (1/2-,3/2-) | 1342.6 10 | 100 | 2465.5 | (3/2-) | |
| 4026.8 6 | A | (1/2,3/2-) | 1561.3 5 | 100 | 2465.5 | (3/2-) | |
| 4046 9 | G | ||||||
| 4444 10 | G | ||||||
| 4483.1 25 ? | F | (17/2-) | 866 1 ? | | 3617.1 | (15/2-) | |
| 4579.4 5 | A | (3/2-) | 771.0 1 985.7 1 1396.3 5 1777.8 5 1992.5 1 | 0 29 3 0 32 3 57 5 100 6 0 57 5 | 3808.3 3593.7 3182.7 2802.0 2587 | (1/2-,3/2-) (5/2-) (5/2-) (1/2-) (5/2-) | |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 4599.3 4 | A | (3/2-) | 1005.8 1 1385.1 1 1416.3 5 1797.0 5 2133.9 5 2514.3 5 | 0 5.8 4 0 5.8 7 20.7 10 14.6 10 100.0 17 13.9 8 | 3593.7 3214.1 3182.7 2802.0 2465.5 2085.4 | (5/2-) (1/2-) (5/2-) (1/2-) (3/2-) 3/2- | |
| 4616 11 | G | ||||||
| 4743 12 | G | ||||||
| 4983 11 | G | ||||||
| 5075.5 9 | A | (1/2,3/2,5/2) | 1267 2 ? 2610 1 2990 2 ? | 19 3 100 10 29 7 | 3808.3 2465.5 2085.4 | (1/2-,3/2-) (3/2-) 3/2- | |
| 5178 11 | G | ||||||
| 5389 12 | G | ||||||
| 5876 13 | G | ||||||
| 5937 13 | G | ||||||
| 6600 50 | G | ||||||
| 6870 50 | G | ||||||
E(level): From least-squares fit to Eγ data for levels populated in γ-ray studies, assuming 1 keV uncertainty when not given. For levels populated in reaction studies with no γ rays, values are from 58Ni(3H,6He).
E(γ): From 55Cu ε decay, unless specified otherwise
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | Final Levels | ||
| Band 1 - Yrast sequence | |||||||
| 0.0 | 7/2- | 203.7 ms 20 % ε = 100 | |||||
| 2882.1 20 | (11/2)- | 2882 2 | | 0.0 | 7/2- | ||
| 3583.1 23 | (13/2-) | 701 1 | | 2882.1 | (11/2)- | ||
| 3617.1 23 | (15/2-) | 735 1 | | 2882.1 | (11/2)- | ||
| 4483.1 25 | (17/2-) | 866 1 ? | | 3617.1 | (15/2-) | ||
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 2882.1 | (11/2)- | B(E2)|^=0.0251 69 for Jπ(2879)=11/2- from Coulomb excitation. | |
| 3583.1 | (13/2-) | XREF: C(?)F(?). | |
| 3759 | (3/2)+ | XREF: d(?). |
1973Di11: search for 55Ni in 59Co(p,5nγ),58Ni(p,p3nγ),E=65 MeV reactions, but no activity could be assigned to 55Ni from γ-ray measurements
1977Ho25: 55Ni produced in 54Fe(3He,2n),E=12.79-15.34 MeV from the E(n) Tandem Van de Graaff generator of Aarhus University. Measured positron spectrum from the decay of 55Ni using a scintillation spectrometer. Measured half-life of the decay of 55Ni from positron decay curve. No γ transitions from the decay of 55Ni to 55Co were observed using a Ge(Li) detector
Production: 1994Bl10 (1994BlZW)
Mass measurements: 2011Tu09, 2010Ka26, 2005Gu36 (analysis)
Theoretical calculations: 33 primary references (32 for structure and one for 55Ni decay) retrieved from the NSR database at www.nndc.bnl.gov/nsr/. These are listed in this dataset under ’document’ records.
Q-value: Q(ε)=8694.0 6, Q(εp)=3629.7 6, S(2n)=31848 25, S(2p)=8966.4 18 (2021Wa16)