Deep inelastic collisions of32S +27Al reaction at 130 MeV bombarding energy

Pramana ◽  
1995 ◽  
Vol 44 (2) ◽  
pp. 177-182 ◽  
Author(s):  
R K Choudhury ◽  
D M Nadkarni ◽  
V S Ambekar ◽  
B V Dinesh ◽  
A Saxena ◽  
...  
Keyword(s):  
Inelastic Collisions ◽  
Bombarding Energy ◽  
27Al Reaction

Bombarding energy dependence of angular momentum transfer in deep inelastic collisions

1982 ◽  
Vol 390 (2) ◽  
pp. 336-350 ◽  
Author(s):  
P.R. Christensen ◽  
Ole Hansen ◽  
O. Nathan ◽  
F. Videbæk ◽  
H. Freiesleben ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Momentum Transfer ◽  
Energy Dependence ◽  
Inelastic Collisions ◽  
Angular Momentum Transfer ◽  
Bombarding Energy

scholarly journals The impact of inelastic self-interacting dark matter on the dark matter structure of a Milky Way halo

2020 ◽  
Author(s):  
Kun Ting Eddie Chua ◽  
Karia Dibert ◽  
Mark Vogelsberger ◽  
Jesús Zavala
Keyword(s):  
Dark Matter ◽  
High Speed ◽  
Cold Dark Matter ◽  
Milky Way ◽  
Direct Detection ◽  
Major Axis ◽  
Inelastic Collisions ◽  
Axis Ratio ◽  
Lower Velocity ◽  
The Impact

Abstract We study the effects of inelastic dark matter self-interactions on the internal structure of a simulated Milky Way (MW)-size halo. Self-interacting dark matter (SIDM) is an alternative to collisionless cold dark matter (CDM) which offers a unique solution to the problems encountered with CDM on sub-galactic scales. Although previous SIDM simulations have mainly considered elastic collisions, theoretical considerations motivate the existence of multi-state dark matter where transitions from the excited to the ground state are exothermic. In this work, we consider a self-interacting, two-state dark matter model with inelastic collisions, implemented in the Arepo code. We find that energy injection from inelastic self-interactions reduces the central density of the MW halo in a shorter timescale relative to the elastic scale, resulting in a larger core size. Inelastic collisions also isotropize the orbits, resulting in an overall lower velocity anisotropy for the inelastic MW halo. In the inner halo, the inelastic SIDM case (minor-to-major axis ratio s ≡ c/a ≈ 0.65) is more spherical than the CDM (s ≈ 0.4), but less spherical than the elastic SIDM case (s ≈ 0.75). The speed distribution f(v) of dark matter particles at the location of the Sun in the inelastic SIDM model shows a significant departure from the CDM model, with f(v) falling more steeply at high speeds. In addition, the velocity kicks imparted during inelastic collisions produce unbound high-speed particles with velocities up to 500 km s−1 throughout the halo. This implies that inelastic SIDM can potentially leave distinct signatures in direct detection experiments, relative to elastic SIDM and CDM.

scholarly journals Light Cluster Production in Central Symmetric Heavy-Ion Reactions from Fermi to Gev Energies

Symmetry ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1406
Author(s):  
Rémi Bougault ◽  
Bernard Borderie ◽  
Abdelouahad Chbihi ◽  
Quentin Fable ◽  
John David Frankland ◽  
...  
Keyword(s):  
Equation Of State ◽  
Transport Model ◽  
Heavy Ion ◽  
Production Mechanism ◽  
State Information ◽  
Heavy Ion Reactions ◽  
Nuclear Equation Of State ◽  
Theoretical Predictions ◽  
Bombarding Energy ◽  
Deuteron Production

Correlations and clustering are of great importance in the study of the Nuclear Equation of State. Information on these items/aspects can be obtained using heavy-ion reactions which are described by dynamical theories. We propose a dataset that will be useful for improving the description of light cluster production in transport model approaches. The dataset combines published and new data and is presented in a form that allows direct comparison of the experiment with theoretical predictions. The dataset is ranging in bombarding energy from 32 to 1930 A MeV. In constructing this dataset, we put in evidence the existence of a change in the light cluster production mechanism that corresponds to a peak in deuteron production.

scholarly journals Inelastic collisions in radiofrequency-dressed mixtures of ultracold atoms

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
Elliot Bentine ◽  
Adam J. Barker ◽  
Kathrin Luksch ◽  
Shinichi Sunami ◽  
Tiffany L. Harte ◽  
...  
Keyword(s):  
Ultracold Atoms ◽  
Inelastic Collisions

Motion periodicity and bifurcation of a wave excited hopping ball

2019 ◽  
Vol 475 (2228) ◽  
pp. 20190137
Author(s):  
Gaurang Ruhela ◽  
Anirvan DasGupta
Keyword(s):  
Wave Amplitude ◽  
Harmonic Wave ◽  
Inelastic Collisions ◽  
Loss Of Stability ◽  
Elastic Surface ◽  
Minimum Frequency ◽  
Surface Motion ◽  
Return Map ◽  
Ball Problem ◽  
Subsequent Loss

We consider the problem of a hopping ball excited by a travelling harmonic wave on an elastic surface. The ball, considered as a particle, is assumed to interact with the surface through inelastic collisions. The surface motion due to the wave induces a horizontal drift in the ball. The problem is treated analytically under certain approximations. The phase space of the hopping motion is captured by constructing a phase-velocity return map. The fixed points of the return map and its compositions represent periodic hopping solutions. The linear stability of the obtained periodic solution is studied in detail. The minimum frequency for the onset of periodic hops, and the subsequent loss of stability at the bifurcation frequency, have been determined analytically. Interestingly, for small values of wave amplitude, the analytical solutions reveal striking similarities with the results of the classical bouncing ball problem.

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