Systematic behavior in the isospin dependence of projectile fragmentation of mirror nuclei with<i>A</i>= 20–60

Ma, Chun-Wang; Wei, Hui-Ling; Liu, Gaojie; Wang, Jun-Yang

doi:10.1088/0954-3899/37/1/015104

Cited by 19 publications

(23 citation statements)

References 33 publications

(52 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SAA model can well reproduce the yield of fragments [49] and was used to study the isospin phenomena in HICs [55][56][57][58]. In brief, in the SAA model, the prefragment is calculated after the numbers of abraded protons and neutrons are known, which are determined by the nuclear-density distribution in the overlapping zone of projectile and target, and the nucleon-nucleon reaction cross section.…”

Section: Isobaric Yield Ratio Methodsmentioning

confidence: 99%

Temperature determined by isobaric yield ratios in heavy-ion collisions

et al. 2012

Phys. Rev. C

View full text Add to dashboard Cite

Background: Temperature (T ) in heavy-ion collisions is an important parameter. Previously, many works have focused on the temperature of the hot emitting source. But there are few systematic studies of the temperature among heavy fragments in peripheral collisions with incident energies near the Fermi energy to a few A GeV, though it is very important to study the property of neutron-rich nucleus in heavy-ion collisions.Purpose: This work focuses on the study of temperature associated with the final heavy fragments in reactions induced by both the neutron-proton symmetric and the neutron-rich projectiles, and with incident energy ranges from 60A MeV to 1A GeV. Methods: Isobaric yield ratio (IYR) is used to determine the temperature of heavy fragments. Cross sections of measured fragments in reactions are analyzed, and a modified statistical abrasion-ablation (SAA) model is used to calculate the yield of fragment in 140A MeV 64 Ni + 9 Be and 1A GeV 136 Xe + 208 Pb reactions. Results: Relatively low T of heavy fragments are obtained in different reactions (T ranges from 1 to 3 MeV). T is also found to depend on the neutron richness of the projectile. The incident energy affects T very little.μ/T (the ratio of the difference between the chemical potential of neutron and proton to temperature) is found to increase linearly as N/Z of projectile increases. It is found that T of the 48 Ca reaction, for which IYRs are A < 50 isobars, is affected greatly by the temperature-corrected B(T ). But T of reactions using IYRs of heavier fragments are only slightly affected by the temperature-corrected B(T ). The SAA model analysis gives a consistent overview of the results extracted in this work. Conclusions: T from IYR, which is for secondary fragments, is different from that of the hot emitting source. T and μ are essentially governed by the sequential decay process.

show abstract

Section: Isobaric Yield Ratio Methodsmentioning

confidence: 99%

Temperature determined by isobaric yield ratios in heavy-ion collisions

et al. 2012

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…The sudden change of the cross sections of large-A fragments in the central collisions has also been observed in previous works, which is explained as one phenomena of skin effects. [15,[41][42][43]. The fragment distributions in the 140A MeV 64 Ni + 9 Be reaction are plotted in Fig.…”

Section: Resultsmentioning

confidence: 99%

Isobaric yield ratio difference between the140AMeVNi58+Be
Qiao
¹
,
Wei
²
,
Ma
³

et al. 2015
Phys. Rev. C
12
0
7
0
View full text Add to dashboard Cite

Background: The isobaric yield ratio difference (IBD) method is found to be sensitive to the density difference of neutron-rich nucleus induced reaction around the Fermi energy.Purpose: An investigation is performed to study the IBD results in the transport model. Methods:The antisymmetric molecular dynamics (AMD) model plus the sequential decay model GEMINI are adopted to simulate the 140A MeV 58,64 Ni + 9 Be reactions. A relative small coalescence radius Rc = 2.5 fm is used for the phase space at t = 500 fm/c to form the hot fragment. Two limitations on the impact parameter (b1 = 0 − 2 fm and b2 = 0 − 9 fm) are used to study the effect of central collisions in IBD.Results: The isobaric yield ratios (IYRs) for the large-A fragments are found to be suppressed in the symmetric reaction. The IBD results for fragments with neutron-excess I = 0 and 1 are obtained. A small difference is found in the IBDs with the b1 and b2 limitations in the AMD simulated reactions. The IBD with b1 and b2 are quite similar in the AMD + GEMINI simulated reactions. Conclusions:The IBDs for the I = 0 and 1 chains are mainly determined by the central collisions, which reflects the nuclear density in the core region of the reaction system. The increasing part of the IBD distribution is found due to the difference between the densities in the peripheral collisions of the reactions. The sequential decay process influences the IBD results. The AMD + GEMINI simulation can better reproduce the experimental IBDs than the AMD simulation.

show abstract

“…T he yield o f fragm ents depends on the isospin o f the reaction system , but the dependence decreases and even can disappear in fragm ents that have a sm all m ass num ber [15][16][17][18][19][20][21]. The probes based on the fragm ent yield m ay depend on the asym m etry (N /Z ) o f the reaction system , such as the isoscaling param eters.…”

Section: Introductionmentioning

confidence: 99%

Target effects in isobaric yield ratio differences between projectile fragmentation reactions

Zhang

Qiao

et al. 2015

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

Background: The isobaric yield ratio difference (IBD) between reactions is know to be sensitive to the density difference between projectiles in heavy-ion collisions around the Fermi energy. Purpose: The target effects in the isobaric yield ratio (IYR) and the IBD results have been studied. Methods: The amount of isotopes in the 140/1 MeV 48,40Ca + I8lTa/9Be and 58 64Ni + l8lTa/9Be reactions have been previously measured with high accuracy. The IYR and IBD results have been obtained from these reactions to study the effects of the light 9Be and heavy 181 Ta targets. A ratio (rA(J between the IBD results for the reactions with Ta and Be targets is defined to quantitatively show the target dependence of the IBD results. Results The IYRs for reactions with symmetric projectiles are more easily affected than those for reactions with neutron-rich projectiles. The IBD results are suppressed by using the l8lTa target to different degrees. Conclusions: The IYR and IBD results are influenced by the target used. The IBD for the / = 1 isobaric chain is suggested as a probe to study the difference between the neutron and proton densities of the reaction systems.

show abstract

Systematic behavior in the isospin dependence of projectile fragmentation of mirror nuclei withA= 20–60

Cited by 19 publications

References 33 publications

Temperature determined by isobaric yield ratios in heavy-ion collisions

Temperature determined by isobaric yield ratios in heavy-ion collisions

Isobaric yield ratio difference between the140AMeVNi58+Be
Qiao
¹
,
Wei
²
,
Ma
³

et al. 2015
Phys. Rev. C
12
0
7
0
View full text Add to dashboard Cite

Target effects in isobaric yield ratio differences between projectile fragmentation reactions

Contact Info

Product

Resources

About

Systematic behavior in the isospin dependence of projectile fragmentation of mirror nuclei withA= 20–60

Cited by 19 publications

References 33 publications

Temperature determined by isobaric yield ratios in heavy-ion collisions

Temperature determined by isobaric yield ratios in heavy-ion collisions

Isobaric yield ratio difference between the140AMeVNi58+BeQiao1, Wei2, Ma3 et al. 2015Phys. Rev. C12070View full textAdd to dashboardCite

Target effects in isobaric yield ratio differences between projectile fragmentation reactions

Contact Info

Product

Resources

About

Isobaric yield ratio difference between the140AMeVNi58+Be
Qiao
¹
,
Wei
²
,
Ma
³

et al. 2015
Phys. Rev. C
12
0
7
0
View full text Add to dashboard Cite