ADOPTED LEVELS, GAMMAS for 56Cr
Author: Balraj Singh | Citation: ENSDF | Cutoff date: 25-Mar-2022
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-)=1626.5 keV 6 | S(n)= 8246.1 keV 6 | S(p)= 13449 keV 27 | Q(α)= -8232.3 keV 28 | ||
Reference: 2021WA16 |
References: | |||
A | 56V β- decay (216 MS) | B | 9Be(57Cr,56CrG) |
C | 48Ca(11B,2npγ) | D | 54Cr(t,p) |
E | 54Cr(t,pγ) | F | 54Cr(α,2He) |
G | 238U(48Ca,xγ) | H | Coulomb Excitation |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABCDEFGH | 0+ | 5.94 m 10 % β- = 100 | |||||
1006.83 10 | ABCDE GH | 2+ | 3.82 ps 10 | 1006.8 1 | 100 | E2 | 0.0 | 0+ |
1675.2 4 | A | (0+) | 668.4 3 | 100 | 1006.83 | 2+ | ||
1831.65 14 | ABCDE G | 2+ | 824.8 1 1830 10 | 100 6 18 6 | M1+E2 Q | 1006.83 0.0 | 2+ 0+ | |
2076.81 14 | BC G | 4+ | 2.18 ps 8 | 1070.0 1 | 100 | E2 | 1006.83 | 2+ |
2278.49 17 | BC G | (3+) | 446.8 1 | 100 | D | 1831.65 | 2+ | |
2325.9 5 | A DE | 2+ | ≤ 0.055 ps | 495.5 1318.0 6 2327.6 | <6 100 11 <6 | D(+Q) | 1831.65 1006.83 0.0 | 2+ 2+ 0+ |
2681.8 10 | CDEF | (4+) | ≥ 0.7 ps | 359 13 850.1 10 1680 15 | 31 9 39 9 100 12 | 2325.9 1831.65 1006.83 | 2+ 2+ 2+ | |
2687.91 20 | D G | (4+) | 409.4 1 | 100 | D | 2278.49 | (3+) | |
2822.93 18 | G | (4+) | 746.1 1 | 100 | D | 2076.81 | 4+ | |
3116.7 6 | G | 1039.9 5 | 100 | 2076.81 | 4+ | |||
3164 6 | DE | (2+,3,4+) | ≤ 0.21 ps | 479 14 835 15 ? 1330 10 ? 2158 6 | 33 24 ≤33 ≤33 100 13 | D+Q,Q | 2681.8 2325.9 1831.65 1006.83 | (4+) 2+ 2+ 2+ |
3251.84 17 | BC G | 6+ | ≥ 0.7 ps | 1175.1 1 | 100 | E2 | 2076.81 | 4+ |
3402 20 | D | |||||||
3451 15 | D | 3- | ||||||
3509 15 | D | 2+ | ||||||
3528.51 22 | G | (5+) | 704.0 10 839.0 10 1248.4 10 | 100 7 56 4 44 5 | D D | 2822.93 2687.91 2278.49 | (4+) (4+) (3+) | |
3648 15 | D | |||||||
3675 15 | D | |||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
3794 15 | D | 3- | ||||||
3819 20 | D | |||||||
3841.15 19 | C G | 6(+) | 589.2 1 1763.8 4 | 100 4 78 4 | D+Q Q | 3251.84 2076.81 | 6+ 4+ | |
3897 15 | D | 0+ | ||||||
3916 20 | D | |||||||
4014 15 | D | |||||||
4112 15 | D | |||||||
4157.56 20 | G | (5,6,7+) | 629.0 1 905.7 1 | 4.0 11 100 5 | 3528.51 3251.84 | (5+) 6+ | ||
4175 15 | D | |||||||
4247 20 | D | |||||||
4284 15 | D | |||||||
4349 15 | D | |||||||
4445 15 | D | |||||||
4447.79 20 | C FG | (7-) | ≥ 0.7 ps | 606.5 1 1196.3 2 | 37 5 100 3 | D | 3841.15 3251.84 | 6(+) 6+ |
4631 15 | D | |||||||
4678 15 | D | |||||||
4732.53 22 | G | (6+,7+) | 574.9 1 1205.5 10 ? | 100 5 21.2 27 | 4157.56 3528.51 | (5,6,7+) (5+) | ||
4750.95 19 | C G | 8+ | 1499.2 1 | 100 | Q | 3251.84 | 6+ | |
4800 20 | D | |||||||
4848 20 | D | |||||||
4892 20 | D | |||||||
4924 20 | D | |||||||
4989 15 | D | |||||||
5060 | F | (5-) | ||||||
5121 15 | D | (3-) | ||||||
5268.4 3 | G | (8+) | 534.9 4 1426.9 6 | 62 5 100 11 | 4732.53 3841.15 | (6+,7+) 6(+) | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
5601.44 20 | C G | (9-) | 332.7 2 850.6 1 1153.6 1 | 2.80 24 36 6 100 3 | D D E2 | 5268.4 4750.95 4447.79 | (8+) 8+ (7-) | |
5990 | F | (5-) | ||||||
6200 | F | (5-) | ||||||
6295.3 8 | G | (8+,9,10+) | 1544.3 10 | 100 | 4750.95 | 8+ | ||
6518.3 3 | G | 10+ | 222.9 10 1767.3 2 | 6.0 12 100 8 | Q | 6295.3 4750.95 | (8+,9,10+) 8+ | |
6872.89 22 | G | 2121.9 1 | 100 | 4750.95 | 8+ | |||
6879.0 3 | C G | (9,10,11-) | 1277.5 2 | 100 | 5601.44 | (9-) | ||
7057.16 22 | C G | (11-) | 1455.7 1 | 100 | Q | 5601.44 | (9-) | |
7330 | F | (6+,8+) | ||||||
7691.9 3 ? | G | 812.9 1 ? | 100 | 6879.0 | (9,10,11-) | |||
8465.5 17 | G | 12+ | 1947.2 16 | 100 | 6518.3 | 10+ | ||
8768.0 3 | C G | (13-) | 1710.8 2 | 100 | Q | 7057.16 | (11-) | |
10849.9 5 | G | (15-) | 2081.9 3 | 100 | 8768.0 | (13-) | ||
13159.4 11 | G | (17-) | 2309.4 10 | 100 | 10849.9 | (15-) |
E(level): From least-squares fit to Eγ data for levels populated in γ-ray studies. Reduced χ2 of 2.3 is slightly larger than 2.0 for 95% confidence level. Energies for levels, not populated in γ-ray studies are from 54Cr(t,p)
E(γ): From weighted averages of available data in β- decay, 48Ca(11B,2npγ), (t,pγ) and 238U(48Ca,Xγ), except as noted.
M(γ): From γ(θ) and γγ(θ)(DCO) in (48Ca,Xγ), unless specified otherwise
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - g.s. band | |||||||
0.0 | 0+ | 5.94 m 10 % β- = 100 | |||||
1006.83 10 | 2+ | 3.82 ps 10 | 1006.8 1 | 100 | E2 | 0.0 | 0+ |
2076.81 14 | 4+ | 2.18 ps 8 | 1070.0 1 | 100 | E2 | 1006.83 | 2+ |
3251.84 17 | 6+ | ≥ 0.7 ps | 1175.1 1 | 100 | E2 | 2076.81 | 4+ |
4750.95 19 | 8+ | 1499.2 1 | 100 | Q | 3251.84 | 6+ | |
6518.3 3 | 10+ | 222.9 10 1767.3 2 | 6.0 12 100 8 | Q | 6295.3 4750.95 | (8+,9,10+) 8+ | |
8465.5 17 | 12+ | 1947.2 16 | 100 | 6518.3 | 10+ | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - Band based on (7-), 4448.0 | |||||||
4447.79 20 | (7-) | ≥ 0.7 ps | |||||
5601.44 20 | (9-) | 332.7 2 850.6 1 1153.6 1 | 2.80 24 36 6 100 3 | D D E2 | 5268.4 4750.95 4447.79 | (8+) 8+ (7-) | |
7057.16 22 | (11-) | 1455.7 1 | 100 | Q | 5601.44 | (9-) | |
8768.0 3 | (13-) | 1710.8 2 | 100 | Q | 7057.16 | (11-) | |
10849.9 5 | (15-) | 2081.9 3 | 100 | 8768.0 | (13-) | ||
13159.4 11 | (17-) | 2309.4 10 | 100 | 10849.9 | (15-) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Additional Data |
1006.83 | 2+ | 3.82 ps 10 | 1006.8 1 | E2 | B(E2)(W.u.)=11.25 30 | |
1831.65 | 2+ | 824.8 1 | M1+E2 | -1.8 10 | ||
2076.81 | 4+ | 2.18 ps 8 | 1070.0 1 | E2 | B(E2)(W.u.)=14.6 6 | |
2325.9 | 2+ | ≤ 0.055 ps | 1318.0 6 | D(+Q) | +0.17 30 | |
3251.84 | 6+ | ≥ 0.7 ps | 1175.1 1 | E2 | B(E2)(W.u.)<28 | |
3841.15 | 6(+) | 589.2 1 | D+Q | +1.2 AP |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 5.94 m 10 % β- = 100 | E(level): g.s. band. |
1006.83 | 2+ | 3.82 ps 10 | E(level): g.s. band. |
2076.81 | 4+ | 2.18 ps 8 | E(level): g.s. band. |
3251.84 | 6+ | ≥ 0.7 ps | E(level): g.s. band. |
4447.79 | (7-) | ≥ 0.7 ps | E(level): Band based on (7-), 4448.0. |
4750.95 | 8+ | E(level): g.s. band. | |
5601.44 | (9-) | E(level): Band based on (7-), 4448.0. | |
6518.3 | 10+ | E(level): g.s. band. | |
7057.16 | (11-) | E(level): Band based on (7-), 4448.0. | |
8465.5 | 12+ | E(level): g.s. band. | |
8768.0 | (13-) | E(level): Band based on (7-), 4448.0. | |
10849.9 | (15-) | E(level): Band based on (7-), 4448.0. | |
13159.4 | (17-) | E(level): Band based on (7-), 4448.0. |
E(level) | E(gamma) | Comments |
1675.2 | 668.4 | E(γ): from 56V β- decay. |
1831.65 | 824.8 | M(γ): from γ(pol) data in (11B,2npγ) | 1830 | E(γ): γ from (t,pγ) only I(γ): γ from (t,pγ) only M(γ): from γ(θ) in (t,pγ) (1976Ba45) |
2076.81 | 1070.0 | M(γ): ΔJ=2, quadrupole from γ(θ) and DCO in (48Ca,Xγ); and RUL for E2 and M2 transitions |
2278.49 | 446.8 | E(γ): from (48Ca,Xγ) (2006Zh42). Other: 450.1 7 in (11B,2npγ) (2003Ap01). Values of Eγ in the two studies differ significantly, however, it appears less likely that there are two closely-spaced J=3 levels. |
2325.9 | 495.5 | E(γ): γ from (t,pγ) only I(γ): γ from (t,pγ) only | 2327.6 | E(γ): γ from (t,pγ) only I(γ): γ from (t,pγ) only |
2681.8 | 359 | E(γ): γ from (t,pγ) only I(γ): γ from (t,pγ) only | 850.1 | E(γ): from (11B,2npγ) (1977Na12) I(γ): from (t,pγ) | 1680 | E(γ): γ from (t,pγ) only I(γ): γ from (t,pγ) only |
2687.91 | 409.4 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
2822.93 | 746.1 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
3116.7 | 1039.9 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
3164 | 479 | E(γ): γ from (t,pγ) only I(γ): γ from (t,pγ) only | 835 | E(γ): γ from (t,pγ) only I(γ): γ from (t,pγ) only | 1330 | E(γ): γ from (t,pγ) only I(γ): γ from (t,pγ) only | 2158 | E(γ): γ from (t,pγ) only I(γ): γ from (t,pγ) only M(γ): from γ(θ) in (t,pγ) |
3251.84 | 1175.1 | M(γ): from γ(θ) and γ(pol) in (11B,2npγ) |
3528.51 | 704.0 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only | 839.0 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only | 1248.4 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
3841.15 | 1763.8 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
4157.56 | 629.0 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only | 905.7 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
4447.79 | 606.5 | E(γ): from (48Ca,Xγ). Ordering of the 588γ - 609γ cascade in (11B,2npγ) (2003Ap01) reversed in (48Ca,Xγ) (2006Zh42). Eγ=608.8 6 in (11B,2npγ) I(γ): unweighted average of 32.4 11 in (48Ca,Xγ) and 41.5 15 in (11B,2npγ) | 1196.3 | I(γ): from (48Ca,Xγ) |
E(level) | E(gamma) | Comments |
4732.53 | 574.9 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only | 1205.5 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
5268.4 | 534.9 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only | 1426.9 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
5601.44 | 332.7 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only | 850.6 | E(γ): from (48Ca,Xγ). Other: Eγ=848.6 6 in (11B,2npγ) I(γ): unweighted average of 29.6 12 in (48Ca,Xγ) and 41.7 15 in (11B,2npγ) | 1153.6 | I(γ): from (48Ca,Xγ) M(γ): from γ(θ) and γ(pol) in (11B,2npγ) |
6295.3 | 1544.3 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
6518.3 | 222.9 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only | 1767.3 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
6872.89 | 2121.9 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
6879.0 | 1277.5 | E(γ): from (48Ca,Xγ). Other: 1282.8 10 in (11B,2npγ) |
7691.9 | 812.9 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
8768.0 | 1710.8 | M(γ): from γ(θ) in (11B,2npγ) |
10849.9 | 2081.9 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
13159.4 | 2309.4 | E(γ): γ from 238U(48Ca,Xγ) only I(γ): γ from 238U(48Ca,Xγ) only |
1960Dr03: 56Cr produced and identified in bombardment of natural chromium metal electroplated on a gold backing with 2.7-2.9 MeV tritons from Los Alamos accelerator, followed by chemical separation of 56Cr, identified by growth of 2.6H 56Mn activity. Measured Eγ, Iγ, βγ-coin, T1/2 of decay of 56Cr to 56Mn. Since the 1960Dr03 work, no other investigation of half-life of 56Cr or its decay appears to have been made.
Earlier attempts by 1956Jo32, by L.p. Roy and L. Yaffe (Can. Jour. Chem. 35, 156 (1957), and by 1960Eh04 were unsuccessful to identify 56Cr activity.
Mass measurement: 2005Gu27
Other reactions:
1992Wa11: 56Fe(π-,π+),E=295 MeV: measured pions, σ(θ); deduced double giant dipole resonance.
1987Gi04: 56Fe(π-,π+),E=100-292 MeV: measured σ; deduced nonanalog and double analog transitions.
1982Se09, 1981Pr02, 1978De30: 59Co(π-,pd),E at rest: measured σ(θ), (particle)(particle)-coin; deduced yields, and missing mass spectra.
Theoretical calculations: 46 primary reference extracted from the NSR database (www.nndc.bnl.gov/nsr/), listed here under document records.
Q-value: S(2n)=14492.4 6, S(2p)=24119 16 (2021Wa16)