ADOPTED LEVELS, GAMMAS for 243Cm
Authors: C.D. Nesaraja, E.A. Mccutchan | Citation: Nucl. Data Sheets 121, 695 (2014) | Cutoff date: 30-Sep-2013
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-1508 keV 5 | S(n)= 5693.0 keV 10 | S(p)= 5575.1 keV 10 | Q(α)= 6168.8 keV 10 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 247Cf α decay | B | 243Bk ε decay |
| C | 244Cm(d,t) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) |
| 0.0 | ABC | 5/2+ | 29.1 y 1 % ε = 0.29 3 % α = 99.71 3 % SF = 5.3×10-9 9 | |||
| 42 2 | C | 7/2+ | ||||
| 87.4 1 | BC | 1/2+ | 1.08 µs 3 | 87.4 1 | 100 | E2 |
| 94 2 | C | 9/2+ | ||||
| 94 2 | C | 3/2+ | ||||
| 114 20 | A C | (7/2+) | ||||
| 153 2 | C | (11/2+) | ||||
| 164 2 | A C | (9/2+) | ||||
| 219 3 | C | (13/2+) | ||||
| 228 3 | C | (11/2+) | ||||
| 260 2 | C | (9/2+) | ||||
| 530 3 | C | |||||
| 729 2 | C | 1/2- | ||||
| 769 2 | C | |||||
| 798 2 | C | |||||
| 842 2 | C | |||||
| 860 4 ? | C | |||||
| 892 2 | C | |||||
| 904 3 | C | |||||
| 930 4 | C | |||||
| 973 2 | C | |||||
| 1015 3 | C | |||||
| 1023 2 | C | |||||
| 1046 4 | C | |||||
| 1136 2 | C | |||||
| 1217 3 | C | |||||
| 1222 4 | C | |||||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) |
| 1359 3 | C | |||||
| 1367 4 | C | |||||
| 1.9E+3 3 | 42 ns 6 % SF ≤ 100 |
E(level): From 244Cm(d,t), except where noted.
Jπ(level): From 244Cm(d,t), except where noted. Assignments were made from comparison of experimental cross sections with those expected from theory with cross sections measured at θ=140|’ and 90|’.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | ||
| Band 1 - 5/2[622] band. α=5.5. | |||||||
| 0.0 | 5/2+ | 29.1 y 1 % ε = 0.29 3 % α = 99.71 3 % SF = 5.3×10-9 9 | |||||
| 42 2 | 7/2+ | ||||||
| 94 2 | 9/2+ | ||||||
| 153 2 | (11/2+) | ||||||
| 219 3 | (13/2+) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | ||
| Band 2 - 1/2[631] band. | |||||||
| 87.4 1 | 1/2+ | 1.08 µs 3 | |||||
| 94 2 | 3/2+ | ||||||
| 260 2 | (9/2+) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | ||
| Band 3 - 7/2[624] band. α=5.7. | |||||||
| 114 20 | (7/2+) | ||||||
| 164 2 | (9/2+) | ||||||
| 228 3 | (11/2+) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | ||
| Band 4 - 1/2[501] band HEAD. | |||||||
| 729 2 | 1/2- | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 87.4 | 1/2+ | 1.08 µs 3 | 87.4 1 | E2 | 35.1 | B(E2)(W.u.)=0.0316 10, α=35.1, α(L)=25.4 4, α(M)=7.18 11, α(N)=2.00 3, α(O)=0.483 8, α(P)=0.0800 12, α(Q)=0.000296 5 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 5/2+ | 29.1 y 1 % ε = 0.29 3 % α = 99.71 3 % SF = 5.3×10-9 9 | μ=0.40 8 (from 1973Ab03 with the uncertainty recommended by 2011StZZ). E(level): 5/2[622] band. α=5.5. |
| 42 | 7/2+ | E(level): 5/2[622] band. α=5.5. | |
| 87.4 | 1/2+ | 1.08 µs 3 | E(level): 1/2[631] band. |
| 94 | 9/2+ | E(level): 5/2[622] band. α=5.5. | |
| 94 | 3/2+ | E(level): 1/2[631] band. | |
| 114 | (7/2+) | XREF: α(95)C(133). E(level): 7/2[624] band. α=5.7. | |
| 153 | (11/2+) | E(level): 5/2[622] band. α=5.5. | |
| 164 | (9/2+) | E(level): 7/2[624] band. α=5.7. | |
| 219 | (13/2+) | E(level): 5/2[622] band. α=5.5. | |
| 228 | (11/2+) | E(level): 7/2[624] band. α=5.7. | |
| 260 | (9/2+) | E(level): 1/2[631] band. | |
| 729 | 1/2- | E(level): 1/2[501] band HEAD. | |
| 1.9E+3 | 42 ns 6 % SF ≤ 100 | Spontaneously fissioning shape isomer, only SF decay has been observed. E(level): Spontaneously fissioning shape isomer, only SF decay has been observed. |
| E(level) | E(gamma) | Comments |
| 87.4 | 87.4 | E(γ): from 243Bk ε decay M(γ): from ce data in 243Bk ε decay. |
First identification: 1950Re55 using 241Am(n,γ)242mAm, β decay to 242Cm and then subsequent 242Cm(n,γ) followed by chemical separation and mass-spectrograph identification.
Theoretical studies and systematics:
2013Zd01: T1/2 for α decay calculated with phenomenological model based on Gamow theory with WKB approximation for Coulomb barrier penetration.
2012Ba35: T1/2 for 34Si cluster decay calculated with generalized liquid drop model.
2012Ku29: T1/2 for 34Si cluster decay calculated with different nuclear proximity potentials
2012Ni16: T1/2 and branching ratios calculated with Multichannel cluster model.
2012Ro34: T1/2 and fission barriers calculated with a generalized liquid drop model.
2012Sa31: T1/2 for 34Si cluster decay calculated with a Coulomb and Proximity Potential model.
2012Ta10: T1/2 for cluster decay calculated with a semi-empirical model.
2012Zh01: β2, β4, moment of inertia, and alignments calculated with a particle conserving method based on the cranked shell model.
2011Ad15: calculations of one-quasi-particle states
2011Es05: calculated shape isomer yield for α + 239Pu reaction.
2011Sh13: calculated cluster T1/2 using effective liquid drop model.
2011Zh36: partial α decay T1/2 to members of favored bands calculated with microscopic tunneling theory
2010Ni02,2010Ni13: T1/2, branching ratios and cluster performation factors calculated with generalized density dependent cluster model.
2007Ro08: calculated T1/2 using generalized liquid drop model.
2006Sh19: levels, Jπ, rotational bands, dipole and quadrupole moments calculated with a cluster model.
2005Pa73: neutron single particle energies calculated with a microscopic-macroscopic approach; T1/2(SF) calculated with Swiatecki formula and extensions.
2005Re16,1990Bh02: calculation of spontaneous fission half-lives of ground and isomeric states.
2004Ro01: analysis of spontaneous-fission half-lives relative to liquid drop model predictions
2004Sa55: analysis of shape isomer excitation energies.
2002Si26: compilation and evaluation of fission isomer data.
1997Ro12: systematic study of spontaneous fission half-lives
1996St28,1994Du03: calculation of hindrance factors and intensities of alphas from 243Cm ground state to the favored band in 239Pu; 1996St28 also calculates anisotropy for this favored α decay.
1994Du03: structure of the ground state calculated using an enlarged superfluid model.
1991Bl07: calculation of partial T1/2 for decay by 34Si emission.
1990Bh02,1989Eg01,1987Gu03,1984Ku05,1981Re06,1980Ku14,1976Ga11, 1972We09,1971Br39: calculations of fission-barrier parameters.
1990Ig01,1989Eg01: fission barrier parameters deduced from analysis of 242Cm(n,γ) cross sections.
1985Lo17,1978Po09: calculation of spontaneous fission half-life of ground state.
1984Ku05: fast-neutron induced fission cross-sections calculated and fission-barrier heights deduced from comparison with data.
1982Be62: evaluation of fast neutron-induced reaction data.
1981Re06: fission-barrier heights calculated from an analysis of fission probabilities deduced from induced fission reactions.
1980Ku14: study of dependence of fission barriers and γ(n)/γ(fission) on neutron number.
1979Is04: compilation of γ(n)/γ(fission) data.
1976Ga11: fission-barrier heights and γ(n)/γ(f) deduced from measurements of fission probability in (3He,df) and (3He,tf) reactions.
1974Ma17: calculation of level density at the neutron binding energy.
1972Ah03: calculation of surface distributions of α particles.
1971Ko31: calculation of level energies with various possible configurations.
1969Po05: calculation of intensities of favored and hindered alpha-transitions to various bands.
Q-value: S(2n)=12662.4 16; S(2p)=10351.1 10 (2012Wa38)