Evolution of quadrupole collectivity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>80</mml:mn></mml:mrow></mml:math>isotones toward the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Z</mml:mi><mml:mo>=</mml:mo><mml:mn>64</mml:mn></mml:mrow></mml:math>subshell gap: The<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>B</mml:mi><mml:mo>(</mml:mo><mml:mi>E</mml:mi><mml:mn>2</mml:mn><mml:mo>;

Stegmann, R.; Bauer, C.; Rainovski, G.; Pietralla, N.; Stahl, C.; Bönig, S.; Ilieva, S.; Blazhev, A.; Damyanova, A.; Danchev, M.; Gladnishki, K.; Jolie, J.; Lutter, R.; Pakarinen, J.; Radeck, D.; Rapisarda, E.; Reiter, P.; Scheck, M.; Siebeck, B.; Stora, T.; Thöle, P.; Thomas, T.; Thürauf, M.; Vermeulen, M. J.; Voulot, D.; Warr, N.; Wenander, F.; Werner, V.; Witte, H. De

doi:10.1103/physrevc.91.054326

Cited by 7 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The latter has received much attention from both experimentalists and theorists. By 1 → 0 + 1 ) values for 134−138 Sm [29], 140 Sm (present work), and the value for 142 Sm [40] compared to theoretical calculations using the general Bohr Hamiltonian (BH) based on a Nilsson potential [41], the interacting boson approximation (IBA) [19], a simple rotational model based on a deformed Woods-Saxon potential (WS) [14], and the 5DCH calculations based on the Gogny D1S interaction from the present work.…”

Section: Discussionmentioning

confidence: 98%

Lifetime measurement for the21+state inSm140and the onset of collectivity in neutron-deficient Sm isotopes

et al. 2015

View full text Add to dashboard Cite

Background: The chain of Sm isotopes exhibits a wide range of nuclear shapes and collective behavior. While the onset of deformation for N > 82 has been well studied both experimentally and theoretically, fundamental data is lacking for some Sm isotopes with N < 82. Purpose: Electromagnetic transition rates represent a sensitive test of theoretical nuclear structure models. Lifetime measurements are furthermore complementary to Coulomb excitation experiments, and the two methods together can give access to spectroscopic quadrupole moments. Method: The lifetime of the 2 + 1 state in 140 Sm was measured with the recoil-distance Doppler shift technique using the reaction 124 Te(20 Ne, 4n) 140 Sm at 82 MeV. Theoretical calculations were performed based on a mapped collective Hamiltonian in five quadrupole coordinates (5DCH) and the Gogny D1S interaction. Results: The lifetime of the 2 + 1 state in 140 Sm was found to be 9.1(6) ps, corresponding to a B(E2; 2 + 1 → 0 + 1) value of 51(4) Weisskopf units. The theoretical calculations are in very good agreement with the experimental result. Conclusions: The B(E2; 2 + 1 → 0 + 1) value for 140 Sm fits smoothly into the systematic trend for the chain of Sm isotopes. The new beyond-mean field calculations are able to correctly describe the onset of collectivity in the Sm isotopes below the N = 82 shell closure for the first time.

show abstract

Section: Discussionmentioning

confidence: 98%

Lifetime measurement for the21+state inSm140and the onset of collectivity in neutron-deficient Sm isotopes

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Bauer et al [44] and Stegmann et al [45] Nd has the expected dependence on p n N N (whereas a dip is observed [92] for 58 138 Ce corresponding to the p ( ) g 7 2 subshell closure at Z=58), the value for 62 142 Sm deviates significantly from the p n N N behavior, reflecting the impact of the p ( ) g d 1 2…”

Section: Evolution Of Quadrupole Collectivity Away From Closed Shellsmentioning

confidence: 89%

“…Bauer et al [44] and Stegmann et al [45] investigated the evolution of quadrupole collectivity for the N=80 isotones, by measuring the  Rn. They observed that contributions from collective excitations are present in these nuclei when moving away from the N=126 closed shell, although they have been proposed to lie in, or at the boundary of the region where the seniority scheme should persist.…”

Section: Evolution Of Quadrupole Collectivity Away From Closed Shellsmentioning

confidence: 99%

“…The extended REX-ISOLDE acceleration scheme was readily applied to even heavier ions and enabled detailed studies of shapes and collectivity in very neutron-rich and neutrondeficient Se, Kr, Rb and Sr nuclei [37][38][39][40][41][42] as well in the rare-earth region [43][44][45]. In recent years results for neutron-deficient Hg, Pb, Po, Rn isotopes were also obtained from CE experiments which provided valuable and complementary insights to the understanding of the structure of this mass region to that obtained using heavy-ion induced fusion reactions [46][47][48].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Nuclear-structure studies of exotic nuclei with MINIBALL

Butler

Cederkäll

Reiter

2017

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

High-resolution γ-ray spectroscopy has been established at ISOLDE for nuclear-structure and nuclear-reaction studies with reaccelerated radioactive ion beams provided by the REX-ISOLDE facility. The MINIBALL spectrometer comprises 24 six-fold segmented, encapsulated high-purity germanium crystals. It was specially designed for highest γ-ray detection efficiency which is advantageous for low-intensity radioactive ion beams. The MINIBALL array has been used in numerous Coulomb-excitation and transfer-reaction experiments with exotic ion beams of energies up to 3 MeV A -1 . The physics case covers a wide range of topics which are addressed with beams ranging from neutron-rich magnesium isotopes up to heavy radium isotopes. In the future the HIE-ISOLDE will allow the in-beam γ-ray spectroscopy program to proceed with higher secondary-beam intensity, higher beam energy and better beam quality.

show abstract

“…Comparison of B(E2) values for transitions in the quasirotational bands on top of the 10 + 1 and 10 + 2 states in 138 Nd (a) and 140 Sm (b) with B(E2) values of transitions in the ground-state bands of the respective (Z − 2) and (N + 2) cores. The B(E2) values for 136 Ce [33], 138 Nd (present work), 140 Nd [41], 140 Sm[15], and 142 Sm[43] are given in Weisskopf units, and the widths of the transitions are proportional to the corresponding B(E2) values.…”

mentioning

confidence: 99%

Lifetime measurements in Nd138

Garrote¹,

Görgen²,

Mihai³

et al. 2018

Phys. Rev. C

View full text Add to dashboard Cite

Lifetimes of several short-lived excited states in 138 Nd were measured with the ROSPHERE array at IFIN-HH, Bucharest, using the recoil-distance Doppler shift technique following the 123 Sb(19 F,4n) reaction. The resulting electromagnetic transition probabilities are compared to large-scale shell model calculations and to constrained Hartree-Fock-Bogoliubov calculations with the Gogny D1S interaction, configuration mixing, and a five-dimensional collective Hamiltonian formalism. The onset of collectivity in Nd isotopes below the N = 82 shell closure and the deformation induced by the alignment of protons and neutron holes in the h 11/2 orbitals are discussed.

show abstract

Evolution of quadrupole collectivity inN=80isotones toward theZ=64subshell gap: TheB(E2;

Cited by 7 publications

References 23 publications

Lifetime measurement for the21+state inSm140and the onset of collectivity in neutron-deficient Sm isotopes

Lifetime measurement for the21+state inSm140and the onset of collectivity in neutron-deficient Sm isotopes

Nuclear-structure studies of exotic nuclei with MINIBALL

Lifetime measurements in Nd138

Contact Info

Product

Resources

About