Quadrupole collectivity in Ca 42 from low-energy Coulomb excitation with AGATA

Quadrupole collectivity in Ca 42 from low-energy Coulomb excitation with AGATA
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DOI：
10.1103/physrevc.97.024326
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发表时间：
2018-02
期刊：
Physical Review C
影响因子：
3.1
通讯作者：
K. Hadyńska-Klęk;P. Napiorkowski;M. Zielińska;J. Srebrny;A. Maj;F. Azaiez;J. Dóbon;M. Kicińska-Habior;F. Nowacki;H. Naïdja;B. Bounthong;T. R. Rodríguez;G. Angelis;T. Abraham;G. A. Kumar;D. Bazzacco;M. Bellato;D. Bortolato;P. Bednarczyk;G. Benzoni;L. Berti;B. Birkenbach;B. Bruyneel;S. Brambilla;F. Camera;J. Chavas;B. Cederwall;L. Charles;M. Ciemala;P. Cocconi;P. Coleman-Smith;A. Colombo;A. Corsi;F. Crespi;D. Cullen;A. Czermak;P. Désesquelles;D. Doherty;B. Dulny;J. Eberth;E. Farnea;B. Fornal;S. Franchoo;A. Gadea;A. Giaz;A. Gottardo;X. Grave;J. Grebosz;A. Görgen;M. Gulmini;T. Habermann;H. Hess;R. Isocrate;J. Iwanicki;G. Jaworski;D. Judson;A. Jungclaus;N. Karkour;M. Kmiecik;D. Karpinski;M. Kisieliński;N. Kondratyev;A. Korichi;M. Komorowska;M. Kowalczyk;W. Korten;M. Krzysiek;G. Lehaut;S. Leoni;J. Ljungvall;A. Lopez-Martens;S. Lunardi;G. Maron;K. Mazurek;R. Menegazzo;D. Mengoni;E. Merchán;W. Mȩczyński;C. Michelagnoli;B. Million;S. Myalski;D. Napoli;M. Niikura;A. Obertelli;S. Ozmen;M. Palacz;L. Prochniak;A. Pullia;B. Quintana;G. Rampazzo;F. Recchia;N. Redon;P. Reiter;D. Rosso;K. Rusek;E. Sahin;M. Salsac;P. Söderström;I. Stefan;O. Stézowski;J. Styczeń;C. Theisen;N. Toniolo;C. Ur;R. Wadsworth;B. Wasilewska;A. Wiens;J. Wood;K. Wrzosek-Lipska;M. Ziȩbliński
K. Hadyńska-Klęk;P. Napiorkowski;M. Zielińska;J. Srebrny;A. Maj;F. Azaiez;J. Dóbon;M. Kicińska-Habior;F. Nowacki;H. Naïdja;B. Bounthong;T. R. Rodríguez;G. Angelis;T. Abraham;G. A. Kumar;D. Bazzacco;M. Bellato;D. Bortolato;P. Bednarczyk;G. Benzoni;L. Berti;B. Birkenbach;B. Bruyneel;S. Brambilla;F. Camera;J. Chavas;B. Cederwall;L. Charles;M. Ciemala;P. Cocconi;P. Coleman-Smith;A. Colombo;A. Corsi;F. Crespi;D. Cullen;A. Czermak;P. Désesquelles;D. Doherty;B. Dulny;J. Eberth;E. Farnea;B. Fornal;S. Franchoo;A. Gadea;A. Giaz;A. Gottardo;X. Grave;J. Grebosz;A. Görgen;M. Gulmini;T. Habermann;H. Hess;R. Isocrate;J. Iwanicki;G. Jaworski;D. Judson;A. Jungclaus;N. Karkour;M. Kmiecik;D. Karpinski;M. Kisieliński;N. Kondratyev;A. Korichi;M. Komorowska;M. Kowalczyk;W. Korten;M. Krzysiek;G. Lehaut;S. Leoni;J. Ljungvall;A. Lopez-Martens;S. Lunardi;G. Maron;K. Mazurek;R. Menegazzo;D. Mengoni;E. Merchán;W. Mȩczyński;C. Michelagnoli;B. Million;S. Myalski;D. Napoli;M. Niikura;A. Obertelli;S. Ozmen;M. Palacz;L. Prochniak;A. Pullia;B. Quintana;G. Rampazzo;F. Recchia;N. Redon;P. Reiter;D. Rosso;K. Rusek;E. Sahin;M. Salsac;P. Söderström;I. Stefan;O. Stézowski;J. Styczeń;C. Theisen;N. Toniolo;C. Ur;R. Wadsworth;B. Wasilewska;A. Wiens;J. Wood;K. Wrzosek-Lipska;M. Ziȩbliński
中科院分区：
物理与天体物理2区
文献类型：
--
作者：
K. Hadyńska-Klęk;P. Napiorkowski;M. Zielińska;J. Srebrny;A. Maj;F. Azaiez;J. Dóbon;M. Kicińska-Habior;F. Nowacki;H. Naïdja;B. Bounthong;T. R. Rodríguez;G. Angelis;T. Abraham;G. A. Kumar;D. Bazzacco;M. Bellato;D. Bortolato;P. Bednarczyk;G. Benzoni;L. Berti;B. Birkenbach;B. Bruyneel;S. Brambilla;F. Camera;J. Chavas;B. Cederwall;L. Charles;M. Ciemala;P. Cocconi;P. Coleman-Smith;A. Colombo;A. Corsi;F. Crespi;D. Cullen;A. Czermak;P. Désesquelles;D. Doherty;B. Dulny;J. Eberth;E. Farnea;B. Fornal;S. Franchoo;A. Gadea;A. Giaz;A. Gottardo;X. Grave;J. Grebosz;A. Görgen;M. Gulmini;T. Habermann;H. Hess;R. Isocrate;J. Iwanicki;G. Jaworski;D. Judson;A. Jungclaus;N. Karkour;M. Kmiecik;D. Karpinski;M. Kisieliński;N. Kondratyev;A. Korichi;M. Komorowska;M. Kowalczyk;W. Korten;M. Krzysiek;G. Lehaut;S. Leoni;J. Ljungvall;A. Lopez-Martens;S. Lunardi;G. Maron;K. Mazurek;R. Menegazzo;D. Mengoni;E. Merchán;W. Mȩczyński;C. Michelagnoli;B. Million;S. Myalski;D. Napoli;M. Niikura;A. Obertelli;S. Ozmen;M. Palacz;L. Prochniak;A. Pullia;B. Quintana;G. Rampazzo;F. Recchia;N. Redon;P. Reiter;D. Rosso;K. Rusek;E. Sahin;M. Salsac;P. Söderström;I. Stefan;O. Stézowski;J. Styczeń;C. Theisen;N. Toniolo;C. Ur;R. Wadsworth;B. Wasilewska;A. Wiens;J. Wood;K. Wrzosek-Lipska;M. Ziȩbliński

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利用来自意大利国家雷格纳罗实验室TANDEM XPU设备的170 mev钙束，进行了研究Ca42电磁特性的库仑激发实验。用AGATA光谱仪测量了Ca42中激发态的γ射线。利用最小二乘编码gosia，确定了Ca42中耦合6个低洼区状态的E2矩阵元素，包括21+和22+对角线E2矩阵元素的大小和相对符号。利用四极求和规则法对得到的E2矩阵元进行了分析，得到了01、2+和21,2+态的整体四极变形，以及01、2+态的三轴性，在Ca42中建立了弱变形的基态带和高度变形的微三轴边带共存。实验结果与最先进的大尺度壳模型和超平均场计算结果进行了比较，较好地再现了Ca42中形状共存的一般情况。
A Coulomb-excitation experiment to study electromagnetic properties of Ca42 was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. γ rays from excited states in Ca42 were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in Ca42, including the diagonal E2 matrix elements of 21+ and 22+ states, were determined using the least-squares code gosia. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 01,2+ and 21,2+ states, as well as triaxiality for 01,2+ states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca42. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in Ca42.