A study of the γ-unstable nucleus<sup>124</sup>Te

Park, P; Subber, A R H; Hamilton, W D; Elliott, J.P.; Kumar, Krishna

doi:10.1088/0305-4616/11/12/005

Cited by 20 publications

(4 citation statements)

References 8 publications

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“…Its first evidence was inferred from the analysis of the E2/M1 mixing and branching ratios in N = 84 isotones [71]. Several subsequent works have guessed the mixed-symmetry character of low-spin states in vibrational and transitional nuclei on the ground of similar arguments [72][73][74][75][76] or by exploiting the sensitivity of the probe to isospin [77][78][79][80]. A more reliable assessment of the mixed-symmetry nature of 2 + states could be made after the measurements of absolute electromagnetic decay strengths [81][82][83][84][85][86][87][88][89].…”

Section: Low-lying Collective Modes: Experimental Evidence and Theorementioning

confidence: 98%

Low-energy nuclear spectroscopy in a microscopic multiphonon approach

Iudice

Ponomarev

Stoyanov

et al. 2012

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

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The low-lying spectra of heavy nuclei are investigated within the quasiparticlephonon model. This microscopic approach goes beyond the quasiparticle random-phase approximation by treating a Hamiltonian of separable form in a microscopic multiphonon basis. It is therefore able to describe the anharmonic features of collective modes as well as the multiphonon states, whose experimental evidence is continuously growing. The method can be put in close correspondence with the proton-neutron interacting boson model. By associating the microscopic isoscalar and isovector quadrupole phonons with proton-neutron symmetric and mixed-symmetry quadrupole bosons, respectively, the microscopic states can be classified, just as in the algebraic model, according to their phonon content and their symmetry. In addition, these states disclose the nuclear properties which are to be ascribed to genuine shell effects, not included in the algebraic approach. Due to its flexibility, the method can be implemented numerically for systematic studies of spectroscopic properties throughout entire regions of vibrational nuclei. The spectra and multipole transition strengths so computed are in overall good agreement with the experimental data. By exploiting the correspondence of the method with the interacting boson model, it is possible to embed the microscopic states into this algebraic frame and, therefore, face the study of nuclei far from shell closures, not directly accessible to merely microscopic approaches. Here, it is shown how this task is accomplished through systematic investigations of magnetic dipole and, especially, electric dipole modes along paths moving from the vibrational to the transitional regions. The method is very well suited to the study of well-deformed nuclei. It provides reliable descriptions of low-lying

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Section: Low-lying Collective Modes: Experimental Evidence and Theorementioning

confidence: 98%

Low-energy nuclear spectroscopy in a microscopic multiphonon approach

Iudice

Ponomarev

Stoyanov

et al. 2012

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

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“…Total cross section of γp −→ π + π − p, γp −→ π + π − π 0 p and γp −→ π + π − p+neutrals. Data are from [55,56,57,58,59,60,61,62,48,63,64,65]. Figure 7: Total cross section of γp −→ π + π − π 0 p in comparison with γp −→ 2π + π − n and γp −→ 3π + 3π − n in comparison with γp −→ 2π + 2π − π 0 p. Data are from [57,56,55,42,48,59,60,61,65].…”

Section: Figurementioning

confidence: 99%

Monte Carlo simulations of photohadronic processes in astrophysics

Mücke

Engel

Rachen

et al. 2000

Computer Physics Communications

411

430

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A new Monte Carlo program for photohadronic interactions of relativistic nucleons with an ambient photon radiation field is presented. The event generator is designed to fulfil typical astrophysical requirements, but can also be used for radiation and background studies at high energy colliders such as LEP2 and HERA, as well as for simulations of photon induced air showers. We consider the full photopion production cross section from the pion production threshold up to high energies. It includes resonance excitation and decay, direct single pion production and diffractive and non-diffractive multiparticle production. The cross section of each individual process is calculated by fitting experimental data, while the kinematics is determined by the underlying particle production process. We demonstrate that our model is capable of reproducing known accelerator data over a wide energy range.

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“…Similar arguments were subsequently used by several authors, e.g., in Refs. [20][21][22][23][24] and others, for the assignment of mixed-symmetry character to off-yrast low-spin states of vibrational and transitional nuclei in different mass regions. Other approaches made use of the isospin sensitivity of hadronic probes for the assignment of MSSs [25][26][27].…”

Section: Introductionmentioning

confidence: 99%