ADOPTED LEVELS, GAMMAS for 184Pb
Author: Coral M. Baglin | Citation: Nucl. Data Sheets 111,275 (2010) | Cutoff date: 1-Oct-2009
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-1.224×104 keV 8 | S(n)= 1.155×104 keV 3 | S(p)= 1753 keV 16 | Q(α)= 6774 keV 4 | ||
Reference: 2012WA38 |
References: | |||
A | 148Sm(40Ca,4nγ) | B | 188Po α decay |
C | 185Bi p decay |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABC | 0+ | 490 ms 25 % α = 80 15 % ε = 20 15 | |||||
570 30 | B | (0+) | 570 | | (E0) | 0.0 | 0+ | |
701.5 | A | (2+) | 701.5 | 100 | 0.0 | 0+ | ||
938.9 | A | (4+) | 237.4 | 100 | 701.5 | (2+) | ||
1261.6 | A | (6+) | 322.7 | 100 | 938.9 | (4+) | ||
1663.4 | A | (8+) | 401.8 | 100 | 1261.6 | (6+) |
E(level): From adopted Eγ, except as noted.
Jπ(level): E(702 level) fits Jπ=2+ level-energy systematics for Pb isotopes; the 402γ-323γ-237γ cascade appears to form a rotational band similar to bands built on 2+ states in 186Pb and 188Pb (1998Co27).
E(γ): From 148Sm(40Ca,4nγ), except as noted; uncertainties unstated by authors.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - Kπ=0+ PROLATE BAND?. | |||||||
570 30 | (0+) | ||||||
701.5 | (2+) | 701.5 | 100 | 0.0 | 0+ | ||
938.9 | (4+) | 237.4 | 100 | 701.5 | (2+) | ||
1261.6 | (6+) | 322.7 | 100 | 938.9 | (4+) | ||
1663.4 | (8+) | 401.8 | 100 | 1261.6 | (6+) |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 490 ms 25 % α = 80 15 % ε = 20 15 | Δ<r2>(184Pb,208Pb)=-1.150 5 (2007De09). See also 2006Se18. E(level): Δ<r2>(184Pb,208Pb)=-1.150 5 (2007De09). See also 2006Se18. |
570 | (0+) | Very tentatively associated with 0+ prolate structures known in 186Pb and 188Pb (1999An52); however, a 0+ oblate state is also expected (based on systematics) at comparable energy, and the proximity of these states may result in highly mixed configurations. E(level): Very tentatively associated with 0+ prolate structures known in 186Pb and 188Pb (1999An52); however, a 0+ oblate state is also expected (based on systematics) at comparable energy, and the proximity of these states may result in highly mixed configurations. Kπ=0+ PROLATE BAND?. | |
701.5 | (2+) | E(level): Kπ=0+ PROLATE BAND?. | |
938.9 | (4+) | E(level): Kπ=0+ PROLATE BAND?. | |
1261.6 | (6+) | E(level): Kπ=0+ PROLATE BAND?. | |
1663.4 | (8+) | E(level): Kπ=0+ PROLATE BAND?. |
E(level) | E(gamma) | Comments |
570 | 570 | E(γ): from level energy difference; ce only were observed, E(ce) unstated by authors. M(γ): from 188Po α decay, based on observation of ce-α coin but absence of γ-α coin in 188Po α decay. |
Production: 147,148Sm(40Ca,xn), E(40Ca)≈260 MeV (1980Du02).
For isotope shift data see, e.g., 2007De09.
Q-value: Note: Current evaluation has used the following Q record -12090 syst 11550 30 1747 17 6774 4 2003Au03,2009AuZZ
Q-value: Uncertainty in Q(β-) is 130 (2003Au03, 2009AuZZ).