Production of medium-mass neutron-rich nuclei in reactions induced by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Xe</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>136</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>projectiles at 1<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>A</mml:mi></mml:mrow></mml:math>GeV on a beryllium target

Benlliure, J.; Fernández‐Ordóñez, M.; Audouin, L.; Boudard, A.; Casarejos, E.; Ducret, J.E.; Enqvist, T.; Heinz, A.; Henzlová, D.; Henzl, V.; Kelić, A.; Leray, S.; Napolitani, P.; Pereira, J.; Rejmund, F.; Ricciardi, M. V.; Schmidt, Karl‐Heinz; Schmitt, C.; Stéphan, C.; Tassan‐Got, L.; Volant, C.; Villagrasa, C.; Yordanov, O.

doi:10.1103/physrevc.78.054605

Cited by 59 publications

(39 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Performing a simple test, decreasing the default potential depth in ABRABLA07 [7] from 47. 4 MeV to 40 MeV, we find no significant influence of that parameter on the ability of ABRABLA07 mass number [6,26,[29][30][31][32], and (blue) bold crosses represent data from Ref. [26,31,33,34] for isotopes that have a larger neutron separation energy than proton separation energy.…”

Section: Discussionmentioning

confidence: 82%

See 1 more Smart Citation

Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes

Thies¹,

Heinz²,

Adachi³

et al. 2016

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

Background: Models describing nuclear fragmentation and fragmentation-fission deliver important input for planning nuclear physics experiments and future radioactive ion beam facilities. These models are usually benchmarked against data from stable beam experiments. In the future, two-step fragmentation reactions with exotic nuclei as stepping stones are a promising tool to reach the most neutron-rich nuclei, creating a need for models to describe also these reactions. Purpose: We want to extend the presently available data on fragmentation reactions towards the light exotic region on the nuclear chart. Furthermore, we want to improve the understanding of projectile fragmentation especially for unstable isotopes.Method: We have measured projectile fragments from 10,12-18 C and 10-15 B isotopes colliding with a carbon target. These measurements were all performed within one experiment, which gives rise to a very consistent dataset. We compare our data to model calculations.Results: One-proton removal cross sections with different final neutron numbers (1pxn) for relativistic 10,12-18 C and 10-15 B isotopes impinging on a carbon target. Comparing model calculations to the data, we find that EPAX is not able to describe the data satisfactorily. Using ABRABLA07 on the other hand, we find that the average excitation energy per abraded nucleon needs to be decreased from 27 MeV to 8.1 MeV. With that decrease ABRABLA07 describes the data surprisingly well.Conclusions: Extending the available data towards light unstable nuclei with a consistent set of new data have allowed for a systematic investigation of the role of the excitation energy induced in projectile fragmentation. Most striking is the apparent mass dependence of the average excitation energy per abraded nucleon. Nevertheless, this parameter, which has been related to final-state interactions, requires further study.

show abstract

Section: Discussionmentioning

confidence: 82%

“…To do that we use data from Refs. [6,26,[29][30][31][32][33][34], as summarized in Table II, and perform ABRABLA07 calculations with f EE between 0.5 and 4 in intervals of 0.1. With the requirements of beam energies above 100 AMeV and data available in tabulated form, we used all to our knowledge published 1pxn removal data available.…”

Section: Discussionmentioning

confidence: 99%

Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes

Thies¹,

Heinz²,

Adachi³

et al. 2016

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…In Fig. 5 we have plotted experimental production cross sections of 46 Pd $ 50 Sn isotopes for 132 Sn [10], 136 Xe [38][39][40] and 238 U [41][42][43] beams. The experimental cross sections are nearly independent of the incident beam energies [18,26,35,[44][45][46][47]38].…”

Section: Benchmark Test Of Simulation Methods For the Production Crosmentioning

confidence: 99%

“…Recently, several simulations have been performed for AA collisions with stable beams such as 12 C [25][26][27], 20 Ne and 24 Mg [28], 40 Ar [29,30], and 56 Fe [30,31] by using Monte Carlo codes such as GEANT4, PHITS, FLUKA [32,33] and so on. In these studies, partial and total fragmentation cross sections have been calculated, and reasonable agreements with the experimental data are obtained.…”

Section: Benchmark Test Of Simulation Methods For the Production Crosmentioning

confidence: 99%

Yield estimation of neutron-rich rare isotopes induced by 200 MeV/u 132 Sn beams by using GEANT4

Shin¹,

Min²,

Ham³

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

a b s t r a c tA so-called ''two-step reaction scheme'', in which neutron-rich rare isotopes obtained from ISOL are post-accelerated and bombarded on a second target, is employed to estimate the production yields of exotic rare isotopes. The production yields of neutron-rich rare isotope fragments induced by 200 MeV/u 132 Sn beams bombarded on a 9 Be target are estimated with Monte Carlo code, GEANT4. To substantiate the use of GEANT4 for this study, benchmark calculations are done for 80 MeV/u 59 Co, 95 MeV/u 72 Zn, 500 MeV/u 92 Mo, and 950 MeV/u 132 Sn beams on the 9 Be target. It is found that 132 Sn beams can produce neutron-rich rare isotopes with 45 6 Z 6 50 more effectively than 238 U beams at the same energy per nucleon.

show abstract

“…The first experimental approach we focus on is a campaign of inverse-kinematics experiments, performed at GSI (Darmstadt): the FRagment Separator [35] (FRS), a high-resolution magnetic achromat [36], was employed to measure the nuclide production in several spallation reactions at around 1AGeV [33,[37][38][39][40][41][42][43][44][45][46][47][48][49][50]. In some systems it was possible to measure the isotopic cross sections of the IMF and the corresponding zero-angle invariant-velocity distributions; these distributions are constructed by selecting only the velocity vectors aligned along the beam direction (they are evidently different from longitudinal projections of the whole velocity distributions).…”

Section: A Experimental Observables: An Examplementioning

confidence: 99%

Frustrated fragmentation and re-aggregation in nuclei: A non-equilibrium description in spallation

Napolitani

Colonna

2015

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

Heavy nuclei bombarded with protons and deuterons in the 1 GeV range have a large probability of undergoing a process of evaporation and fission; less frequently, the prompt emission of few intermediate-mass fragments can also be observed.We employ a recently developed microscopic approach, based on the Boltzmann-Langevin transport equation, to investigate the role of mean-field dynamics and phase-space fluctuations in these reactions.We find that the formation of few IMF's can be confused with asymmetric fission when relying on yield observables, but it can not be assimilated to the statistical decay of a compound nucleus when analysing the dynamics and kinematic observables: it can be described as a fragmentation process initiated by phase-space fluctuations, and successively frustrated by the mean-field resilience. As an extreme situation, which corresponds to non-negligible probability, the number of fragments in the exit channel reduces to two, so that fission-like events are obtained by re-aggregation processes.This interpretation, inspired by nuclear-spallation experiments, can be generalised to heavy-ion collisions from Fermi to relativistic energies, for situations when the system is closely approaching the fragmentation threshold. I. CONTEXTSeveral decades passed from Serber's early description [1] of nuclear reactions induced by nucleons and light nuclei at few hundred MeV per nucleon. In their standard outline, such reactions, generally called spallation, could be described as a fast excitation of an atomic nucleus, followed by a slower decay process [2,3]: depending on the phase space available [4,5], the system undergoes a sequence of more or less asymmetric splits [6, 7] ranging from particle evaporation to fission. It was found already in pioneering studies [8][9][10][11][12][13][14][15][16][17], that the most excited systems can also produce intermediate-mass fragments (IMF), and lead to a richer phenomenology comparable with nucleus-nucleus collisions and nuclear fragmentation [18][19][20][21]. Further research focused on the study of thermodynamic observables from spallation reactions in the relativistic domain [22][23][24][25], in connection with the liquid-gas phase transition in nuclear matter [26,27], and in parallel with the research on the multifragmentation process observed in ion-ion collisions in the Fermi-energy domain [28][29][30][31][32].Several fields of application, from energy and environment to neutron sources and exotic beams, stimulated intense research on protons and deuterons in the 1 GeV range impinging on heavy nuclei. The production of some specific light nuclides with large kinetic energy resulted of great relevance in several technical issues (radiation damages, fragilisation of structural materials in acceleratordriven systems, side effects in medical hadron-therapies). This despite the minor contribution of the whole IMF production to the total reaction cross section, which was found to amount to few millibarn. In more recent experiments, the possibility of correlati...

show abstract

Production of medium-mass neutron-rich nuclei in reactions induced byXe136projectiles at 1AGeV on a beryllium target

Cited by 59 publications

References 46 publications

Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes

Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes

Yield estimation of neutron-rich rare isotopes induced by 200 MeV/u 132 Sn beams by using GEANT4

Frustrated fragmentation and re-aggregation in nuclei: A non-equilibrium description in spallation

Contact Info

Product

Resources

About