ADOPTED LEVELS for 249Md
Author: Khalifeh Abusaleem | Citation: Nucl. Data Sheets 112, 2129 (2011) | Cutoff date: 31-Dec-2010
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-4.5×103 keV SY | S(n)= 8.0×103 keV SY | S(p)= 1.95×103 keV SY | Q(α)= 8441 keV 18 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 253Lr α decay (1.42 S) | B | 253Lr α decay (0.64 S) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0.0 | A | (7/2-) | 21.7 s 20 % α > 60 % ε ≤ 40 |
| 0.0+X | A | (1/2-) | 1.9 s 9 |
| 0.0+Y | B |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (7/2-) | 21.7 s 20 % α > 60 % ε ≤ 40 | Calculated: T1/2(α)=68 s, T1/2(ε+β+)=90 s (1997Mo25). |
Calculations, compilations:
Favored α decay: 1993Bu09
Ground state properties: 1997Mo25, 1995Mo29
Single-particle Nilsson levels: 2004Pa04, 1994Cw02
2004Pa40 calculate the following single-particle level sequence: g.s. 1/2[521], 0.30 MeV 7/2[514], 0.39 MeV 7/2[633], 0.57 MeV 9/2[624], 0.68 MeV 3/2[521], 1.03 MeV 5/2[512]
1994Cw02 calculate the following single-particle level sequence: g.s. 1/2[521], 0.31 MeV 7/2[514], 0.43 MeV 7/2[633], 0.68 MeV 9/2[624], 0.83 MeV 3/2[521]
Assignment: 241Am(12C,4n), 243Am(12C,6n), parent of 245Es, grandparent of 245Cf (1973Es01).
2001He35: Observed two α’s: Eα1=8023 keV with intensity of 0.79 12 FWHM=40.1 keV and Eα2=8080 keV with intensity of 0.21, FWHM=26.3. This together with the half lives indicate the existence of two isomers
Both 253Lr isomers are parents of 24 s 249Md (1999He11)
Q-value: Note: Current evaluation has used the following Q record
Q-value: -4490 syst 7894 syst 1870 syst 8463 syst 2009AuZZ
Q-value: Estimated ΔQ(β-)=358, ΔS(n)=375, ΔS(p)=301, ΔQ(α)=100