ADOPTED LEVELS, GAMMAS for 222Ra
Authors: Sukhjeet Singh, A. K. Jain, Jagdish K. Tuli | Citation: Nucl. Data Sheets 112,2851 (2011) | Cutoff date: 31-Mar-2011
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-2300 keV 7 | S(n)= 6714 keV 7 | S(p)= 6246 keV 7 | Q(α)= 6679 keV 5 | ||
Reference: 2012WA38 |
References: | |||
A | 226Th α decay | B | 222Fr β- decay |
C | 232Th(136Xe,xγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABC | 0+ | 38.0 s 5 % α = 100 % 14C = 3.0×10-8 10 | |||||
111.12 2 | ABC | 2+ | 0.52 ns 4 | 111.2 2 | 28 12 | E2 | 0.0 | 0+ |
242.11 2 | ABC | 1- | < 1.2 ns | 131.00 2 242.11 2 | 32.1 16 100 5 | [E1] E1 | 111.12 0.0 | 2+ 0+ |
301.39 4 | ABC | 4+ | < 1.4 ns | 190.7 2 | 100 19 | E2 | 111.12 | 2+ |
317.29 5 | ABC | 3- | 75.13 2 206.17 5 | 0.017 4 100 10 | E1 | 242.11 111.12 | 1- 2+ | |
473.76 8 | ABC | (5-) | 172.37 2 | | 301.39 | 4+ | ||
550.3 4 | C | (6+) | 248.4 2 | 86 17 | E2 | 301.39 | 4+ | |
703.2 4 | C | (7-) | 153.1 5 229.3 5 | 72 23 13 4 | E1 E2 | 550.3 473.76 | (6+) (5-) | |
843.3 4 | C | (8+) | 140.1 2 292.9 2 | 66 12 61 5 | E1 E2 | 703.2 550.3 | (7-) (6+) | |
914.0 3 | A | (0+) | 671.9 3 802.7 5 | 100 11 21 8 | 242.11 111.12 | 1- 2+ | ||
992.4 5 | C | (9-) | 149.3 5 289.0 5 | 50 8 44 5 | E1 E2 | 843.3 703.2 | (8+) (7-) | |
1024.9 2 | AB | 2+ | 707.5 2 723.4 4 782.8 2 913.7 4 1025.0 4 | 100 5 3.4 5 98 9 17 3 6.7 12 | 317.29 301.39 242.11 111.12 0.0 | 3- 4+ 1- 2+ 0+ | ||
1170.9 2 | B | (3-,4+) | 696.9 2 853.8 2 869.6 2 | 28.7 5 100 7 81 25 | 473.76 317.29 301.39 | (5-) 3- 4+ | ||
1171.6 3 | B | 1+,1-,2+ | 929.5 2 1060.3 2 1171.7 2 | 15 2 100 8 53 6 | 242.11 111.12 0.0 | 1- 2+ 0+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1173.3 5 | C | (10+) | 180.9 2 330.1 2 | 57 13 43 4 | E1 E2 | 992.4 843.3 | (9-) (8+) | |
1225.2 2 | B | 1+,1-,2+ | 982.9 2 1114.3 2 1225.2 2 | 97 19 100 19 38 7 | 242.11 111.12 0.0 | 1- 2+ 0+ | ||
1265.0 3 | B | (2+,3) | 963.6 2 1153.9 2 | 26 4 100 10 | 301.39 111.12 | 4+ 2+ | ||
1310.2 3 | B | 1068.1 2 | | 242.11 | 1- | |||
1330.8 6 | C | (11-) | 157.4 5 338.3 5 | 27 4 42 4 | E1 E2 | 1173.3 992.4 | (10+) (9-) | |
1360.6 3 | B | 1043.6 2 1249.1 2 | 100 13 60 11 | 317.29 111.12 | 3- 2+ | |||
1375.7 3 | B | 1133.6 2 | | 242.11 | 1- | |||
1402.6 2 | B | (3-) | 231.7 2 377.6 2 1085.2 2 1101.1 2 1160.5 2 1291.6 2 | 15.2 16 24 2 92 12 100 10 14.4 14 9.6 16 | 1170.9 1024.9 317.29 301.39 242.11 111.12 | (3-,4+) 2+ 3- 4+ 1- 2+ | ||
1432.6 3 | B | 1,2,3- | 1190.4 3 1321.6 2 | 8.5 15 100 8 | 242.11 111.12 | 1- 2+ | ||
1439.9 2 | B | (3-) | 269.0 2 415.0 2 966.2 2 1122.4 2 1138.5 2 1198.0 2 | 13 3 11 2 23 5 40 7 100 10 30 5 | 1170.9 1024.9 473.76 317.29 301.39 242.11 | (3-,4+) 2+ (5-) 3- 4+ 1- | ||
1499.5 3 | B | 1-,2,3- | 474.5 3 1182.1 3 1257.5 3 1388.5 3 | 100 10 87 10 33 7 76 10 | 1024.9 317.29 242.11 111.12 | 2+ 3- 1- 2+ | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1537.2 6 | C | (12+) | 206.2 5 363.9 5 | 27 5 42 4 | E1 E2 | 1330.8 1173.3 | (11-) (10+) | |
1556.1 4 | B | 2+ | 1238.6 3 1254.4 4 1445.2 4 1556.5 4 | 100 13 26 3 69 11 59 11 | 317.29 301.39 111.12 0.0 | 3- 4+ 2+ 0+ | ||
1619.6 4 | B | 1377.4 3 1508.7 4 | 100 15 24 7 | 242.11 111.12 | 1- 2+ | |||
1644.9 3 | B | 2+,3- | 619.9 2 1327.6 2 1343.3 3 1402.5 4 1534.1 4 | 31 4 100 9 10.4 17 27 3 17 3 | 1024.9 317.29 301.39 242.11 111.12 | 2+ 3- 4+ 1- 2+ | ||
1710.3 6 | C | (13-) | 173.1 5 379.6 5 | 28 4 34 3 | E1 E2 | 1537.2 1330.8 | (12+) (11-) | |
1754.4 6 | B | 3- | 351.7 2 1281.0 3 1436.4 3 1453.4 3 1643.9 3 | 52 12 34 7 100 7 45 10 44 12 | 1402.6 473.76 317.29 301.39 111.12 | (3-) (5-) 3- 4+ 2+ | ||
1821.5 5 | B | 1,2,3 | 1579.4 4 | | 242.11 | 1- | ||
1841.2 5 | 1,2,3 | 196.3 2 1599.6 4 | 100 13 16 5 | 1644.9 242.11 | 2+,3- 1- | |||
1933.2 7 | C | (14+) | 396.0 5 | 30 4 | E2 | 1537.2 | (12+) | |
2125.3 7 | C | (15-) | 192.1 5 415.0 5 | 23 10 34 4 | E1 E2 | 1933.2 1710.3 | (14+) (13-) | |
2358.7 8 | C | (16+) | 425.5 5 | 24 4 | E2 | 1933.2 | (14+) | |
2570.1 8 | C | (17-) | 211.4 5 444.8 5 | 32 6 | E2 | 2358.7 2125.3 | (16+) (15-) | |
2811.0 10 | C | (18+) | 452.3 5 | 17 4 | E2 | 2358.7 | (16+) | |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
3040.9 10 | C | (19-) | 470.8 5 | 15 4 | E2 | 2570.1 | (17-) | |
3287.7 11 | C | (20+) | 476.7 5 | 10 4 | E2 | 2811.0 | (18+) |
E(γ): From 232Th(136Xe,Xγ) dataset. Those not observed in this dataset are taken from decay datasets.
E(γ): From 226Th α decay and 222Fr β- decay. The uncertainties of γ’s deexciting the levels above 1 MeV have been increased because of a poor energy fit to the level scheme; therefore, the Eγ values have been rounded off here. See 222Fr β- decay section for the experimental values listed by the authors.
I(γ): Relative photon intensity deexciting each level.
M(γ): From GAMMASPHERE data (1999Co02). Multipolarities inside the square brackets are from the ce work in 226Tl α decay.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - K=0 GS band. | |||||||
0.0 | 0+ | 38.0 s 5 % α = 100 % 14C = 3.0×10-8 10 | |||||
111.12 2 | 2+ | 0.52 ns 4 | 111.2 2 | 28 12 | E2 | 0.0 | 0+ |
301.39 4 | 4+ | < 1.4 ns | 190.7 2 | 100 19 | E2 | 111.12 | 2+ |
550.3 4 | (6+) | 248.4 2 | 86 17 | E2 | 301.39 | 4+ | |
843.3 4 | (8+) | 140.1 2 292.9 2 | 66 12 61 5 | E1 E2 | 703.2 550.3 | (7-) (6+) | |
1173.3 5 | (10+) | 180.9 2 330.1 2 | 57 13 43 4 | E1 E2 | 992.4 843.3 | (9-) (8+) | |
1537.2 6 | (12+) | 206.2 5 363.9 5 | 27 5 42 4 | E1 E2 | 1330.8 1173.3 | (11-) (10+) | |
1933.2 7 | (14+) | 396.0 5 | 30 4 | E2 | 1537.2 | (12+) | |
2358.7 8 | (16+) | 425.5 5 | 24 4 | E2 | 1933.2 | (14+) | |
2811.0 10 | (18+) | 452.3 5 | 17 4 | E2 | 2358.7 | (16+) | |
3287.7 11 | (20+) | 476.7 5 | 10 4 | E2 | 2811.0 | (18+) | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - K=0 octupole VIBRATIONAL band. | |||||||
242.11 2 | 1- | < 1.2 ns | |||||
317.29 5 | 3- | 75.13 2 206.17 5 | 0.017 4 100 10 | E1 | 242.11 111.12 | 1- 2+ | |
473.76 8 | (5-) | 172.37 2 | | 301.39 | 4+ | ||
703.2 4 | (7-) | 153.1 5 229.3 5 | 72 23 13 4 | E1 E2 | 550.3 473.76 | (6+) (5-) | |
992.4 5 | (9-) | 149.3 5 289.0 5 | 50 8 44 5 | E1 E2 | 843.3 703.2 | (8+) (7-) | |
1330.8 6 | (11-) | 157.4 5 338.3 5 | 27 4 42 4 | E1 E2 | 1173.3 992.4 | (10+) (9-) | |
1710.3 6 | (13-) | 173.1 5 379.6 5 | 28 4 34 3 | E1 E2 | 1537.2 1330.8 | (12+) (11-) | |
2125.3 7 | (15-) | 192.1 5 415.0 5 | 23 10 34 4 | E1 E2 | 1933.2 1710.3 | (14+) (13-) | |
2570.1 8 | (17-) | 211.4 5 444.8 5 | 32 6 | E2 | 2358.7 2125.3 | (16+) (15-) | |
3040.9 10 | (19-) | 470.8 5 | 15 4 | E2 | 2570.1 | (17-) | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - K=0 band. | |||||||
914.0 3 | (0+) | ||||||
1024.9 2 | 2+ | 707.5 2 723.4 4 782.8 2 913.7 4 1025.0 4 | 100 5 3.4 5 98 9 17 3 6.7 12 | 317.29 301.39 242.11 111.12 0.0 | 3- 4+ 1- 2+ 0+ |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
111.12 | 2+ | 0.52 ns 4 | 111.2 2 | E2 | 6.26 | B(E2)(W.u.)=111 9, α=6.26 |
242.11 | 1- | < 1.2 ns | 131.00 2 | [E1] | 0.254 | B(E1)(W.u.)>1.5E-5, α=0.254 |
1- | < 1.2 ns | 242.11 2 | E1 | 0.0580 | B(E1)(W.u.)>7.4E-6, α=0.0580 | |
301.39 | 4+ | < 1.4 ns | 190.7 2 | E2 | 0.716 | B(E2)(W.u.)>12, α=0.716 |
317.29 | 3- | 206.17 5 | E1 | 0.0847 | α=0.0847 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 38.0 s 5 % α = 100 % 14C = 3.0×10-8 10 | 14C branching from measured values of I(14C)/I(α)= 3.7×10-10 6 (1985Pr01), 3.1×10-10 10(1985Ho21), and 2.3×10-10 3 (1991Hu02). 1991Hu02 searched also for any 14C branching to the 3- state in 208Pb at 2614 keV and deduced an upper limit of 2×10-10% for its branch. E(level): 14C branching from measured values of I(14C)/I(α)= 3.7×10-10 6 (1985Pr01), 3.1×10-10 10(1985Ho21), and 2.3×10-10 3 (1991Hu02). 1991Hu02 searched also for any 14C branching to the 3- state in 208Pb at 2614 keV and deduced an upper limit of 2×10-10% for its branch. K=0 GS band. |
111.12 | 2+ | 0.52 ns 4 | E(level): K=0 GS band. |
242.11 | 1- | < 1.2 ns | E(level): K=0 octupole VIBRATIONAL band. |
301.39 | 4+ | < 1.4 ns | E(level): K=0 GS band. |
317.29 | 3- | The nuclear electric dipole moment was deduced by 1992Ru01 as 0.036 6 fm from the branching ratio for E1, E2 transitions deexciting the level. The electric quadrupole moment of 6.74 b 28 for both the g.s. and the Kπ=0- band was assumed. E(level): The nuclear electric dipole moment was deduced by 1992Ru01 as 0.036 6 fm from the branching ratio for E1, E2 transitions deexciting the level. The electric quadrupole moment of 6.74 b 28 for both the g.s. and the Kπ=0- band was assumed. K=0 octupole VIBRATIONAL band. | |
473.76 | (5-) | E(level): K=0 octupole VIBRATIONAL band. | |
550.3 | (6+) | E(level): K=0 GS band. | |
703.2 | (7-) | E(level): K=0 octupole VIBRATIONAL band. | |
843.3 | (8+) | E(level): K=0 GS band. | |
914.0 | (0+) | E(level): K=0 band. | |
992.4 | (9-) | E(level): K=0 octupole VIBRATIONAL band. | |
1024.9 | 2+ | E(level): K=0 band. | |
1173.3 | (10+) | E(level): K=0 GS band. | |
1330.8 | (11-) | E(level): K=0 octupole VIBRATIONAL band. | |
1537.2 | (12+) | E(level): K=0 GS band. | |
1710.3 | (13-) | E(level): K=0 octupole VIBRATIONAL band. | |
1933.2 | (14+) | E(level): K=0 GS band. | |
2125.3 | (15-) | E(level): K=0 octupole VIBRATIONAL band. | |
2358.7 | (16+) | E(level): K=0 GS band. | |
2570.1 | (17-) | E(level): K=0 octupole VIBRATIONAL band. | |
2811.0 | (18+) | E(level): K=0 GS band. | |
3040.9 | (19-) | E(level): K=0 octupole VIBRATIONAL band. | |
3287.7 | (20+) | E(level): K=0 GS band. |
E(level) | E(gamma) | Comments |
242.11 | 242.11 | M(γ): from ce work in 226Th α decay |
317.29 | 206.17 | M(γ): from ce work in 226Th α decay |
For calculations of level energies by various methods, some including deformations of order higher than β(2), and for discussions on level structure see 2006Sa53, 2005Za02, 2003Sh02, 2001Za04 2001Za09, 1998Bu18, 1998Ra05, 1997Bu07, 1997Bu28, 1995De13, 1987En05, 1986Da03, 1985Na07, 1983Pi04, 1983Ia01, 1980Sh07, 1970Ne08
For theoretical calculations of equilibrium deformations and deformation energies see 1994Cw01, 1991Sk01, 1988So08, 1986Bo19, 1986Le05, 1984Na22, 1983Ro14, 1982Le19, 1982Du16 and 1981Gy03.
Exotic nuclear shapes, including superdeformation, hyperdeformation and octupole shapes, were calculated and discussed by 1994Cw01, 1992Ch20, 1992SkZZ, 1989De11, 1989Eg02, 1988Ba48, 1988Ro05, 1988So08, 1987Na10, 1987Ro08, 1986Bo19, 1986Ch23, 1984Na22.
For calculations of electric-dipole moment, and for discussions on the strong octupole effects and octupole deformation, as well as higher order of deformations, see 2004Ad15, 2003Ad32, 1991Eg01, 1991Bu10, 1989De11, 1986Le05
See 1988Ro02 for the E1, E3 transition probabilities and the 0+, 1- energy splitting.
See 1986Le05, 1993Yo02 for calculations of B(E1)/B(E2) transition probabilities from the Kπ=0- band.
For calculations of 14C emission probability, partial half-lives and branchings by using various models, see 1984Po08, 1985Po11, 1985Sh01, 1986De32, 1986Gr20, 1986Ir01, 1986Ka46, 1986La01, 1986Pi11, 1986Po15, 1986Ru11, 1987Bl04, 1987Gu04, 1987Iv01, 1987Po08, 1987Sh04, 1988Ba01, 1988Bl11, 1988Iv02, 1988Sh29, 1988Ta25, 1989Bu06, 1989Ci03, 1989Ma21, 1989Sh37, 1990Ba20, 1990Bu09, 1990Hu07, 1990Ka15, 1990Sh01, 1991Bu01, 1992Gu10, 1993Bu05, 1993De38, 1993Go18, 1993Gr15, 1993Gu11, 1993Ka21, 1993Si26, 1994Bu07, 1994De38, 1995Si05, 1998Ro11, 2002Sa55, 2004Re22, 2004Ba64, 2005Ku32, 2006Xu15, 2009Qi07, 2009Ro16, 2010Ni13, 2008Ni12
See 2001Ch02 for calculation of yrast band energies
Weighted mean of intrinsic electric dipole moment/intrinsic electric quadrupole moment=4.02 11 extracted from B(E1)/B(E2) (2007Co08)
Levels: The Kπ=0+ g.s. band and the Kπ=0- band at 242.11 keV have been interpreted as octupole parity-doublet bands. This nucleus falls slightly to the left of middle of the region of octupole deformation defined by the spin systematics for octupole shapes (1990Ja11).
Q-value: Note: Current evaluation has used the following Q record