Microscopic Study of Structures and Excitations of Exotic Nuclei

PEI Junchen; WANG Kai; ZUO Zhiwei

doi:10.11804/NuclPhysRev.34.03.374

Nuclei are quantum systems in the evolution from few-body to many-body systems, and can exhibit many amazing collective phenomena. With the development of several advanced radioactive-beam facilities, the study of structures and excitations of extreme unstable exotic nuclei has become a hot issue. In this work, we solve the self-consistent FAM-QRPA in large deformed coordinate-spaces to treat continuum effects. We study properties of structures and collective excitations in deformed drip-line nuclei. We found that in weakly bound nuclei ⁴⁰Mg, the diffuse surface density and pairing density play an important role in low-lying resonance. Through analysis of deformation-induced K-splitting in isovector dipole modes, we see that pygmy resonances have very different mechanism compared to giant resonances. In addition, large-scale fittings are performed to develop highprecision effective interactions, which will provide more reliable theoretical model for related subjects, such as nuclear astrophysics and nuclear fission energy.

Microscopic Study of Structures and Excitations of Exotic Nuclei

State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China

Funds: National Natural Science Foundation of China(11375016, 11522538)

Received Date: 2017-03-24

Rev Recd Date: 2017-07-10

Publish Date: 2017-07-18

Key words:

Abstract: Nuclei are quantum systems in the evolution from few-body to many-body systems, and can exhibit many amazing collective phenomena. With the development of several advanced radioactive-beam facilities, the study of structures and excitations of extreme unstable exotic nuclei has become a hot issue. In this work, we solve the self-consistent FAM-QRPA in large deformed coordinate-spaces to treat continuum effects. We study properties of structures and collective excitations in deformed drip-line nuclei. We found that in weakly bound nuclei ⁴⁰Mg, the diffuse surface density and pairing density play an important role in low-lying resonance. Through analysis of deformation-induced K-splitting in isovector dipole modes, we see that pygmy resonances have very different mechanism compared to giant resonances. In addition, large-scale fittings are performed to develop highprecision effective interactions, which will provide more reliable theoretical model for related subjects, such as nuclear astrophysics and nuclear fission energy.

HTML

Reference (33)

[1]	ZHOU S G. arXiv:nucl-th/1703.09045, 2017.
[2]	ERLER J, BIRGE N, KORTELAINEN M, et al. Nature, 2012, 486:509.
[3]	TANIHATA I, SAVAJOLS H, KANUNGO R. Progress in Partical and Nuclear Physics, 2013, 68:215.
[4]	BERTULANI C A. Phys Rev C, 2007, 75:024606.
[5]	HOFFMAN C R, KAY B P, SCHIFFER J P. Phys Rev C, 2014, 89:061305.
[6]	HAMMER H W, JI C, PHILLIP D R. arXiv:nucl-th/1702.08605, 2017.
[7]	BENDER M, HEENEN P H, REINHARD P G. Rev Mod Phys, 2003, 75:121.
[8]	NAKATSUKASA T, MATSUYANAGI K, MATTUO M, et al. Rev Mod Phys, 2016, 88:045004.
[9]	ELHATISARI S, LEE D, RUPAK G, et al. Nature, 2015, 528:111.
[10]	HAGEN G, PAPENBROCK T, DEAN D J, et al. Phys Rev Lett, 2008, 101:092502.
[11]	PAAR N, VRETENAR D, KHAN E, et al. Rept Prog Phys, 2007, 70:691.
[12]	MISU T, NAZAREWICZ W, ABERG S. Nucl Phys A, 1997, 614:44.
[13]	ZHOU S G, MENG J, RING P, et al. Phys Rev C, 2010, 82:011301(R).
[14]	PEI J C, ZHANG Y N, XU F R. Phys Rev C, 2013, 87:051302(R); ZHANG Y N, PEI J C, XU F R. Phys Rev C, 2013, 88:054305.
[15]	RING P, SCHUCK P. The Nuclear Many-body Problem[M]. Berlin:Springer, 1980.
[16]	FANG D L, FAESSLER A,RODIN V, et al. Phys Rev C, 2010, 81:037303.
[17]	AVOGADRO P, NAKATSUKASA T. Phys Rev C, 2011, 84:014314.
[18]	STOITSOV M, KORTELAINEN M, NAKATSUKASA T, et al. Phys Rev C, 2011, 84:041305(R); NIKŠIĆ T, KRALJ N, TUTIŠ T, et al. Phys Rev C, 2013, 88:044327; LIANG H, NAKATSUKASA T, NIU Z, et al. Phys Rev C, 2013, 87:054310; HINOHARA N, KORTELAINEN M, NAZAREWICZ W. Phys Rev C, 2013, 87:064309.
[19]	PEI J C, STOITSOV M V, FANN G I, et al. Phys Rev C, 2008, 78:064306.
[20]	PEI J C, KORTELAINEN M, ZHANG Y N, et al. Phys Rev C, 2014, 90:051304(R).
[21]	KORTELAINEN M, HINOHARA N, NAZAREWICZ W. Phys Rev C, 2015, 92:051302(R).
[22]	STOITSOV M V, DOBACZEWSKI J, NAZAREWICZ W, et al. Comp Phys Comm, 2015, 167:43
[23]	WANG K, KORTELAINEN M, PEI J C. arXiv:nuclth/1612.06019, 2016.
[24]	XIONG X Y, PEI J C, CHEN W J. Phys Rev C, 2016, 93:024311.
[25]	BAUMANN T, AMTHOR A M, BAZIN D, et al. Nature, 2007, 449:1022.
[26]	TERASAKi J, FLOCARD H, HEENEN P H, et al. Nucl Phys A, 1997, 621:706.
[27]	http://www-phynu.cea.fr
[28]	TAKEUCHI S, MATSUSHITA M, AOI N, et al. Phys Rev Lett, 2012, 109:182501.
[29]	LI T, GARG U, LIU Y, et al. Phys Rev Lett, 2007, 99:162503.
[30]	REPKO A, REINHARD P G, NESTERENKOV O, et al. Phys Rev C, 2013, 87:024305.
[31]	BERTSCH G F, BROGLIA R A. Oscillations in Finite Quantum Systems[M]. Cambridge University Press, 1994.
[32]	KORTELAINEN M, LESINSKI T, MORÉ J, et al. Phys Rev C, 2010, 82:024313.
[33]	HEYDE K, VON NEUMANN-COSEL P, RICHTER A. Rev Mod Phys, 2010, 82:2365.

Microscopic Study of Structures and Excitations of Exotic Nuclei

doi: 10.11804/NuclPhysRev.34.03.374

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views