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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03771naa a2200517 4500 | |
| 001 | oai:lup.lub.lu.se:655e1c14-121b-4cd2-9037-bba14bd2fca2 | |
| 003 | SwePub | |
| 008 | 160401s2010 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://lup.lub.lu.se/record/17529792 URI |
| 024 | 7 | a https://doi.org/10.1103/PhysRevC.82.0443192 DOI |
| 040 | a (SwePub)lu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Hayes, A. B.4 aut |
| 245 | 1 0 | a Coulomb excitation of a Am-242 isomeric target: E2 and E3 strengths, rotational alignment, and collective enhancement |
| 264 | 1 | c 2010 |
| 520 | a A 98% pure Am-242m ( K = 5(-), t(1/2) = 141 years) isomeric target was Coulomb excited with a 170.5-MeV Ar-40 beam. The selectivity of Coulomb excitation, coupled with the sensitivity of Gammasphere plus CHICO, was sufficient to identify 46 new states up to spin 18h in at least four rotational bands; 11 of these new states lie in the isomer band, 13 in a previously unknown yrast K-pi = 6(-) rotational band, and 13 in a band tentatively identified as the predicted yrast K-pi = 5(+) band. The rotational bands based on the K-pi = 5- isomer and the 6(-) bandhead were populated by Coulomb excitation with unexpectedly equal cross sections. The gamma-ray yields are reproduced by Coulomb excitation calculations using a two-particle plus rotor model (PRM), implying nearly complete Delta K = 1 mixing of the two almost-degenerate rotational bands, but recovering the Alaga rule for the unperturbed states. The degeneracy of the 5(-) and 6(-) bands allows for precise determination of the mixing interaction strength V, which approaches the strong-mixing limit; this agrees with the 50% attenuation of the Coriolis matrix element assumed in the model calculations. The fractional admixture of the I-K(pi) = 6(6)(-) state in the nominal 6(5)(-) isomer band state is measured within the PRM as 45.6(-1.1)(+0.3)%. The E2 and M1 strengths coupling the 5(-) and 6(-) bands are enhanced significantly by the mixing, while E1 and E2 couplings to other low-K bands are not measurably enhanced. The yields of the 5(+) band are reproduced by an E3 strength of approximate to 15 W.u., competitive with the interband E2 strength. Alignments of the identified two-particle Nilsson states in Am-242 are compared with the single-particle alignments in Am-241. | |
| 650 | 7 | a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng |
| 700 | 1 | a Cline, D.4 aut |
| 700 | 1 | a Moody, K. J.4 aut |
| 700 | 1 | a Ragnarsson, Ingemaru Lund University,Lunds universitet,Matematisk fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH4 aut0 (Swepub:lu)matf-ira |
| 700 | 1 | a Wu, C. Y.4 aut |
| 700 | 1 | a Becker, J. A.4 aut |
| 700 | 1 | a Carpenter, M. P.4 aut |
| 700 | 1 | a Carroll, J. J.4 aut |
| 700 | 1 | a Gohlke, D.4 aut |
| 700 | 1 | a Greene, J. P.4 aut |
| 700 | 1 | a Hecht, A. A.4 aut |
| 700 | 1 | a Janssens, R. V. F.4 aut |
| 700 | 1 | a Karamian, S. A.4 aut |
| 700 | 1 | a Lauritsen, T.4 aut |
| 700 | 1 | a Lister, C. J.4 aut |
| 700 | 1 | a Macri, R. A.4 aut |
| 700 | 1 | a Propri, R.4 aut |
| 700 | 1 | a Seweryniak, D.4 aut |
| 700 | 1 | a Wang, X.4 aut |
| 700 | 1 | a Wheeler, R.4 aut |
| 700 | 1 | a Zhu, S.4 aut |
| 710 | 2 | a Matematisk fysikb Fysiska institutionen4 org |
| 773 | 0 | t Physical Review C (Nuclear Physics)g 82:4q 82:4x 0556-2813 |
| 856 | 4 | u http://dx.doi.org/10.1103/PhysRevC.82.044319y FULLTEXT |
| 856 | 4 8 | u https://lup.lub.lu.se/record/1752979 |
| 856 | 4 8 | u https://doi.org/10.1103/PhysRevC.82.044319 |
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