Lifetime measurements in 99Nb and 99Zr: Investigation of shape coexistence

被引：3

作者：

Pfeil, A. ^{[1
]}

Nomura, K. ^{[2
]}

Gavrielov, N. ^{[3
,4
]}

Regis, J. -M. ^{[1
]}

Koster, U. ^{[5
]}

Kim, Y. H. ^{[6
]}

Esmaylzadeh, A. ^{[1
]}

Harter, A. ^{[1
]}

Jolie, J. ^{[1
]}

Knafla, L. ^{[1
]}

Ley, M. ^{[1
]}

Karayonchev, V. ^{[1
,7
]}

机构：

[1] Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany

[2] Hokkaido Univ, Dept Phys, Sapporo 0600810, Japan

[3] Yale Univ, Ctr Theoret Phys, New Haven, CT 06520 USA

[4] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

[5] Inst Laue Langevin, 71 Ave Martyrs, F-38042 Grenoble, France

[6] Inst for Basic Sci Korea, 55 Expo Ro, Daejeon 34126, South Korea

[7] Argonne Natl Lab, 9700 South Cass Ave, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW C | 2023年 / 108卷 / 03期

关键词：

CHARGE RADII; DEFORMATION; NUCLEI; ZR; EVOLUTION; SR; TRANSITION; FEATURES; REGION; STATES;

D O I：

10.1103/PhysRevC.108.034310

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 A approximate to 100 mass region is of special interest due to a rapid shape transition, observed by going from neutron number 58 to 60, especially pronounced in the Zr isotopes, where 98Zr is weakly and100Zr is strongly deformed. To further examine this intricate phenomenon, in this work lifetimes of low-lying excited states in the nuclei 99Zr and 99Nb were determined using fast-timing techniques and an experimental setup consisting of four LaBr3(Ce) detectors. Neutron rich A = 99 fragments were produced in neutron induced fission and separated by the spectrometer LOHENGRIN at the Institut Laue-Langevin in Grenoble, France. Experimental values are compared to two different calculations in the framework of the interacting boson-fermion model and discussed in the context of shape coexistence.

引用

页数：14

共 64 条

[1] Table of experimental nuclear ground state charge radii: An update [J].

Angeli, I. ;

Marinova, K. P. .

ATOMIC DATA AND NUCLEAR DATA TABLES, 2013, 99 (01) :69-95

[2] Experimental study of the lifetime and phase transition in neutron-rich 98,100,102Zr [J].

Ansari, S. ;

Regis, J. -M. ;

Jolie, J. ;

Saed-Samii, N. ;

Warr, N. ;

Korten, W. ;

Zielinska, M. ;

Salsac, M. -D. ;

Blanc, A. ;

Jentschel, M. ;

Koster, U. ;

Mutti, P. ;

Soldner, T. ;

Simpson, G. S. ;

Drouet, F. ;

Vancraeyenest, A. ;

de France, G. ;

Clement, E. ;

Stezowski, O. ;

Ur, C. A. ;

Urban, W. ;

Regan, P. H. ;

Podolyak, Zs. ;

Larijani, C. ;

Townsley, C. ;

Carroll, R. ;

Wilson, E. ;

Mach, H. ;

Fraile, L. M. ;

Paziy, V. ;

Olaizola, B. ;

Vedia, V. ;

Bruce, A. M. ;

Roberts, O. J. ;

Smith, J. F. ;

Scheck, M. ;

Kroell, T. ;

Hartig, A. -L. ;

Ignatov, A. ;

Ilieva, S. ;

Lalkovski, S. ;

Marginean, N. ;

Otsuka, T. ;

Shimizu, N. ;

Togashi, T. ;

Tsunoda, Y. .

PHYSICAL REVIEW C, 2017, 96 (05)

[3] RECOIL SEPARATOR LOHENGRIN - PERFORMANCE AND SPECIAL FEATURES FOR EXPERIMENTS [J].

ARMBRUSTER, P ;

ASGHAR, M ;

BOCQUET, JP ;

DECKER, R ;

EWALD, H ;

GREIF, J ;

MOLL, E ;

PFEIFFER, B ;

SCHRADER, H ;

SCHUSSLER, F ;

SIEGERT, G ;

WOLLNIK, H .

NUCLEAR INSTRUMENTS & METHODS, 1976, 139 (DEC15) :213-222

[4] Neutrinoless double-β decay in the microscopic interacting boson model [J].

Barea, J. ;

Iachello, F. .

PHYSICAL REVIEW C, 2009, 79 (04)

[5] HALF-LIVES OF LEVELS IN NB-99 AND MO-99 [J].

BATTISTUZZI, G ;

KAWADE, K ;

LAWIN, H ;

SHIZUMA, K ;

SISTEMICH, K .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1982, 306 (02) :113-116

[6] CALCULATION OF DECAY TIMES FROM COINCIDENCE EXPERIMENTS [J].

BAY, Z .

PHYSICAL REVIEW, 1950, 77 (03) :419-419

[7] Nuclear Data Sheets for A=99 [J].

Browne, E. ;

Tuli, J. K. .

NUCLEAR DATA SHEETS, 2011, 112 (02) :275-446

[8] COEXISTENCE FEATURES IN THE SPHERICAL-DEFORMED A-ALMOST-EQUAL-TO-100 TRANSITION REGION - PICOSECOND LIFETIME MEASUREMENTS IN SR-97, Y-97, AND ZR-97 [J].

BUSCHER, M ;

CASTEN, RF ;

GILL, RL ;

SCHUHMANN, R ;

WINGER, JA ;

MACH, H ;

MOSZYNSKI, M ;

SISTEMICH, K .

PHYSICAL REVIEW C, 1990, 41 (03) :1115-1125

[9] Quantum phase transitions in the shapes of atomic nuclei [J].

Cejnar, Pavel ;

Jolie, Jan ;

Casten, Richard F. .

REVIEWS OF MODERN PHYSICS, 2010, 82 (03) :2155-2212

[10] The shape transition in the neutron-rich yttrium isotopes and isomers [J].

Cheal, B. ;

Gardner, M. D. ;

Avgoulea, M. ;

Billowes, J. ;

Bissell, M. L. ;

Campbell, P. ;

Eronen, T. ;

Flanagan, K. T. ;

Forest, D. H. ;

Huikari, J. ;

Jokinen, A. ;

Marsh, B. A. ;

Moore, I. D. ;

Nieminen, A. ;

Penttila, H. ;

Rinta-Antila, S. ;

Tordoff, B. ;

Tungate, G. ;

Aysto, J. .

PHYSICS LETTERS B, 2007, 645 (2-3) :133-137

← 1 2 3 4 5 6 7 →