Quadrupole-octupole coupled states in {sup 112}Cd

The properties of negative-parity states in the 2.5 MeV region in {sup 112}Cd have been investigated with the (n,n{sup {prime}}{gamma}) reaction. For many of these levels, lifetimes have been measured, and B(E1) and B(E2) values for their decays have been determined. Several transitions exhibit enhanced B(E2) values for decay to the 3{sub 1}{sup {minus}} octupole state, indicative of quadrupole-octupole coupled (2{sup +}{circle_times}3{sup {minus}}) states. The B(E1) values observed are typically in the range of 1{endash}5{times}10{sup {minus}4} Weisskopf units (W.u.), irrespective of the final state. {copyright} {ital 1999} {ital The American Physical Society}

[1]  D. Bandyopadhyay,et al.  Mixed-symmetry strength in 114 Cd , 2003 .

[2]  D. Kusnezov,et al.  Octupole correlations in U and Pu nuclei , 2003 .

[3]  A. Gade,et al.  Evidence for the complete quadrupole-octupole coupled multiplet in 108 Cd , 2002 .

[4]  C. Kohstall,et al.  Low-lying dipole excitations in the stable Cd isotopes: A systematics , 2001 .

[5]  C. Kohstall,et al.  New evidence for the E1 core polarization in spherical nuclei , 2001 .

[6]  N. Warr,et al.  Structures and lifetimes of states in 110 Cd , 2000 .

[7]  J. Duprat,et al.  Evidence for deformation in 113-116Cd isotopes , 2000 .

[8]  P. Garrett,et al.  Nuclear Structure Studies With the Inelastic Neutron Scattering Reaction and Gamma-Ray Detection , 2000, Journal of research of the National Institute of Standards and Technology.

[9]  H. Lehmann,et al.  Dipole excitations in the vibrational nucleus112Cd , 1999 .

[10]  A. Zilges,et al.  Systematics of low-lying electric dipole excitations in the A ~ 130-200 mass region , 1998 .

[11]  G. Molnár,et al.  Analysis of Doppler-shift attenuation measurements performed with accelerator-produced monoenergetic neutrons , 1996 .

[12]  Radermacher,et al.  Direct proof of the two-phonon character of the dipole excitations in 142Nd and 144Sm around 3.5 MeV. , 1996, Physical review. C, Nuclear physics.

[13]  R. Casten,et al.  Evidence for pervasive phonon structure of nuclear excitations , 1996 .

[14]  Benedict,et al.  Structural characteristics of 142Ce through inelastic neutron scattering. , 1995, Physical review. C, Nuclear physics.

[15]  H. Lehmann,et al.  Search for nuclei exhibiting the U(5) dynamical symmetry , 1995 .

[16]  H. Lehmann,et al.  The U(5)-O(6) model: An analytical approach to shape coexistence , 1995 .

[17]  Z. Nemeth,et al.  Low-lying dipole excitations in the isotopes 113,114Cd , 1994 .

[18]  Boerner,et al.  E2 and E3 transitions from quadrupole-octupole coupled states in 144Nd. , 1994, Physical review letters.

[19]  D. S. Brenner,et al.  The enigma of 114Cd. A classical case of ambiguities in quantum mechanical state mixing , 1992 .

[20]  Maino,et al.  Full-symmetry and mixed-symmetry states in 110,112,114Cd. , 1991, Physical review. C, Nuclear physics.

[21]  J. Blachot.  Nuclear data sheets for A = 114 , 1990 .

[22]  Johnson,et al.  Fast E1 transitions and evidence for octupole-octupole and quadrupole-octupole excitations in 144Sm. , 1990, Physical review. C, Nuclear physics.

[23]  D. Cline,et al.  Quadrupole collective properties of 114Cd , 1988 .

[24]  Browne,et al.  114Cd from 112Cd(t,p). , 1988, Physical review. C, Nuclear physics.

[25]  Fortune.  Intruder-g.s. mixing in Cd nuclei. , 1987, Physical review. C, Nuclear physics.

[26]  Bauer,et al.  (p,t) reaction on even-mass cadmium nuclei: Test for the admixture of intruder configurations in the ground states. , 1986, Physical review. C, Nuclear physics.

[27]  K. Schreckenbach,et al.  The level structure of 114Cd from (n, γ) and (d, p) studies☆ , 1984 .

[28]  M. Waroquier,et al.  Description of the low-lying levels in /sup 112,114/Cd , 1982 .

[29]  P. Green,et al.  3/sup -/ octupole states in the even Cd nuclei. [keV region,. gamma. angular distribution] , 1977 .

[30]  K. B. Winterbon.  An analytic theory of Doppler-shift attenuation , 1975 .

[31]  D. Gill,et al.  Do the 3$sup -$ octupole states in the even Cd isotopes exist , 1974 .

[32]  E. Sheldon,et al.  Computation of total and differential cross section for compound nuclear reactions of the type (a, a), (a, a'), (a, b), (a, γ), (a, γ-γ), (a, bγ) and (a, bγ-γ) , 1973 .