EXCITATION-ENERGY AND TRANSITION STRENGTH SYSTEMATICS OF MIXED SYMMETRICAL J-PI=1+ STATES FROM INELASTIC ELECTRON-SCATTERING

被引：54
作者：
HARTMANN, U
BOHLE, D
GUHR, T
HUMMEL, KD
KILGUS, G
MILKAU, U
RICHTER, A
机构：
[1] Institut für Kernphysik, Technische Hochschule Darmstadt
来源：
NUCLEAR PHYSICS A | 1987年 / 465卷 / 01期
关键词：
D O I：
10.1016/0375-9474(87)90297-1
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The experimental systematics of the excitation energy of mixed symmetric Jπ = 1+ states in 46,48Ti, 110Pd, 154Sm, 154,156,158Gd, 164Dy, 168Er, 174Yb, 232Th and 238U is compared with theoretical predictions. The emphasis is placed on a unified description in terms of the interacting boson model (IBM-2). The Majorana force parameter changes in a systematic way as a function of the product of active neutrons and protons participating in the collective motion. The systematics of the M1 strength distribution in the rare earth nuclei is also discussed. So far only the IBM-2 description using an F-spin invariant Majorana force is able to account for the trend of the data. © 1987.
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页码：25 / 34
页数：10
相关论文
共 30 条
[1]   COLLECTIVE NUCLEAR STATES AS SYMMETRIC COUPLINGS OF PROTON AND NEUTRON EXCITATIONS [J].
ARIMA, A ;
OHTSUKA, T ;
IACHELLO, F ;
TALMI, I .
PHYSICS LETTERS B, 1977, 66 (03) :205-208
[2]   COLLECTIVE M1 STATES IN THE CLASSICAL LIMIT OF THE NEUTRON-PROTON INTERACTING BOSON MODEL [J].
BALANTEKIN, AB ;
BARRETT, BR .
PHYSICAL REVIEW C, 1985, 32 (01) :288-292
[3]   M1 TRANSITION STRENGTH IN THE SU(3) LIMIT OF THE GENERALIZED IBM-2 [J].
BARRETT, BR ;
HALSE, P .
PHYSICS LETTERS B, 1985, 155 (03) :133-136
[4]   NEW MAGNETIC DIPOLE EXCITATION MODE STUDIED IN THE HEAVY DEFORMED NUCLEUS GD-156 BY INELASTIC ELECTRON-SCATTERING [J].
BOHLE, D ;
RICHTER, A ;
STEFFEN, W ;
DIEPERINK, AEL ;
IUDICE, NL ;
PALUMBO, F ;
SCHOLTEN, O .
PHYSICS LETTERS B, 1984, 137 (1-2) :27-31
[5]   FURTHER EVIDENCE FOR THE NEW COLLECTIVE MAGNETIC DIPOLE MODE IN HEAVY DEFORMED-NUCLEI [J].
BOHLE, D ;
KUCHLER, G ;
RICHTER, A ;
STEFFEN, W .
PHYSICS LETTERS B, 1984, 148 (4-5) :260-264
[6]   NPNN SYSTEMATICS IN HEAVY-NUCLEI [J].
CASTEN, RF .
NUCLEAR PHYSICS A, 1985, 443 (01) :1-28
[7]   ON THE NATURE OF LOW-LYING COLLECTIVE 1+ STATES IN THE HEAVY DEFORMED-NUCLEI SM-154,GD-156,DY-164 AND IN THE F7/2 SHELL NUCLEUS TI-46 [J].
DJALALI, C ;
MARTY, N ;
MORLET, M ;
WILLIS, A ;
JOURDAIN, JC ;
BOHLE, D ;
HARTMANN, U ;
KUCHLER, G ;
RICHTER, A ;
CASKEY, G ;
CRAWLEY, GM ;
GALONSKY, A .
PHYSICS LETTERS B, 1985, 164 (4-6) :269-273
[8]   AN IBM ANALYSIS OF A SINGLE J-SHELL OF NEUTRONS AND PROTONS [J].
EVANS, JA ;
ELLIOTT, JP ;
SZPIKOWSKI, S .
NUCLEAR PHYSICS A, 1985, 435 (02) :317-332
[9]  
FASSLER A, 1986, J PHYS G, V12, pL74
[10]  
GREINER W, 1965, PHYS REV LETT, V15, P599
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