ADOPTED LEVELS, GAMMAS for 168Dy
Author: Coral M. Baglin | Citation: Nucl. Data Sheets 111, 1807 (2010) | Cutoff date: 15-Jun-2010
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1.50×103 keV 15 | S(n)= 6.70×103 keV 16 | S(p)= 9.92×103 keV SY | Q(α)= -1.21×103 keV SY | ||
| Reference: 2012WA38 |
| References: | |||
| A | 168Tb β- decay | B | 170Er(82Se,84KrG) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | AB | 0+ | 8.7 m 3 % β- = 100 | |||||
| 0.0+X | A | (3+) | ||||||
| 74.96 6 | AB | (2+) | 74.96 6 | 100 | [E2] | 0.0 | 0+ | |
| 227.03+X 16 | A | (4-) | 227.03 16 | 100 | [E1] | 0.0+X | (3+) | |
| 248.33 10 | AB | (4+) | 173.37 8 | 100 | [E2] | 74.96 | (2+) | |
| 516 | B | (6+) | 268 | 100 | [E2] | 248.33 | (4+) | |
| 873 | B | (8+) | 357 | 100 | [E2] | 516 | (6+) | |
| 1315 | B | (10+) | 442 | 100 | [E2] | 873 | (8+) | |
E(level): From Eγ.
Jπ(level): From apparent g.s. band structure in 170Er(82Se,84Krγ), except as noted.
E(γ): From 168Tb β- decay, except as noted.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - Kπ=0+ GS band (2010So03). | |||||||
| 0.0 | 0+ | 8.7 m 3 % β- = 100 | |||||
| 74.96 6 | (2+) | ||||||
| 248.33 10 | (4+) | 173.37 8 | 100 | [E2] | 74.96 | (2+) | |
| 516 | (6+) | 268 | 100 | [E2] | 248.33 | (4+) | |
| 873 | (8+) | 357 | 100 | [E2] | 516 | (6+) | |
| 1315 | (10+) | 442 | 100 | [E2] | 873 | (8+) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 74.96 | (2+) | 74.96 6 | [E2] | 8.18 | α=8.18 | |
| 227.03+X | (4-) | 227.03 16 | [E1] | 0.0349 | α=0.0349 | |
| 248.33 | (4+) | 173.37 8 | [E2] | 0.383 | α=0.383 | |
| 516 | (6+) | 268 | [E2] | 0.0915 | α=0.0915 | |
| 873 | (8+) | 357 | [E2] | 0.0384 | α=0.0384 | |
| 1315 | (10+) | 442 | [E2] | 0.0210 | α=0.0210 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 0+ | 8.7 m 3 % β- = 100 | E(level): From 170Er(82Se,84Krγ); uncertainties unstated by authors. Kπ=0+ GS band (2010So03). |
| 0.0+X | (3+) | Jπ(level): Speculative value from 1999As03, who assign the 227γ as an interband γ because its energy exceeds that expected from systematics for intraband γ’s in lighter even-even Dy, in which intense octupole to γ band ΔJ=-1 transitions are known. Strong β- feeding from (4-) 168Tb to the J=4 member of the octupole band is likely, and band energy systematics suggest that the J=4 member of the octupole band and the J=3 member of the γ band lie in the vicinity of 1300 and 1050, respectively, consistent with observed Eγ. Poor statistics precluded the observation by 1999As03 of expected transitions connecting the γ and g.s. bands. | |
| 74.96 | (2+) | E(level): From 170Er(82Se,84Krγ); uncertainties unstated by authors. Kπ=0+ GS band (2010So03). | |
| 227.03+X | (4-) | Jπ(level): Speculative value from 1999As03, who assign the 227γ as an interband γ because its energy exceeds that expected from systematics for intraband γ’s in lighter even-even Dy, in which intense octupole to γ band ΔJ=-1 transitions are known. Strong β- feeding from (4-) 168Tb to the J=4 member of the octupole band is likely, and band energy systematics suggest that the J=4 member of the octupole band and the J=3 member of the γ band lie in the vicinity of 1300 and 1050, respectively, consistent with observed Eγ. Poor statistics precluded the observation by 1999As03 of expected transitions connecting the γ and g.s. bands. | |
| 248.33 | (4+) | E(level): From 170Er(82Se,84Krγ); uncertainties unstated by authors. Kπ=0+ GS band (2010So03). | |
| 516 | (6+) | E(level): From 170Er(82Se,84Krγ); uncertainties unstated by authors. Kπ=0+ GS band (2010So03). | |
| 873 | (8+) | E(level): From 170Er(82Se,84Krγ); uncertainties unstated by authors. Kπ=0+ GS band (2010So03). | |
| 1315 | (10+) | E(level): From 170Er(82Se,84Krγ); uncertainties unstated by authors. Kπ=0+ GS band (2010So03). |
Identification: genetic relationship to 168Ho activity, as observed in Dy/Ho fraction from spontaneous fission of 252Cf (1982Ge04).
The adopted level scheme is taken from 1999As03. The energy offset x for the 0.0+x and 227+x levels is possibly of the order of 1 MeV; see comment on tentative Jπ for these levels.
Other Reactions:
170Er(18O,20Ne) (1998Lu08): E(18O)=104 MeV; determined mass excess for 168Dy.
Q-value: Note: Current evaluation has used the following Q record $ 1.50×103 14 6.70×103 15 10.01×103SY-1240 syst 2003Au03,2009AuZZ
Q-value: ΔS(p)=420, ΔQ(α)=420 (2003Au03, 2009AuZZ).