Even-odd effects in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>N</mml:mi></mml:math>distributions of fragments emitted at intermediate energies

Lombardo, I.; Agodi, C.; Amorini, F.; Anzalone, A.; Auditore, L.; Berceanu, I.; Cardella, G.; Cavallaro, S.; Chatterjee, M. B.; Filippo, E. De; Geraci, E.; Giuliani, G.; Grassi, L.; Han, Jifeng; Guidara, E. La; Loria, D.; Lanzalone, G.; Maiolino, C.; Pagano, A.; Papa, M.; Pirrone, S.; Politi, G.; Porto, F.; Rizzo, F.; Russotto, P.; Trifiró, A.; Trimarchi, M.; Verde, G.; Vigilante, M.

doi:10.1103/physrevc.84.024613

Cited by 41 publications

(27 citation statements)

References 31 publications

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“…R(Z) oscillates around 1 (dashed line) and a clear odd-even staggering is observed, with the even-Z ions being more abundantly populated than the odd ones. This bears out the gross features already observed in previous experiments [1][2][3]6,7]. The staggering is large (R ≈ 10%-15%) for medium-charge ions with Z 16 and it decreases with increasing Z.…”

supporting

confidence: 87%

“…In turn, the staggering on N distributions (integrated over all isotones) is enhanced for neutron-rich systems [7]. There are also indications for a weakening of the odd-even Z staggering with increasing centrality of the collision [6].…”

mentioning

confidence: 92%

“…The enhancement in the yield of even elements over the neighboring odd ones is usually of the order of few tens percent for the lightest elements and it rapidly decreases with increasing Z. Recent experiments [3,6,7], performed with detectors providing good isotopic resolution, revealed a rather complex behavior. It was found that even-mass fragments display indeed an odd-even staggering with an enhanced yield of even-Z nuclei.…”

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confidence: 99%

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Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

Casini¹,

Piantelli²,

Maurenzig³

et al. 2012

Phys. Rev. C

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Odd-even staggering effects on charge distributions are investigated for fragments produced in semiperipheral and central collisions of 112 Sn + 58 Ni at 35 MeV/nucleon. For fragments with Z 16 one observes a clear overproduction of even charges, which decreases for heavier fragments. Staggering persists up to Z ∼ 30. The staggering appears to be substantially independent of the centrality of the collisions, suggesting that it is mainly related to the last few steps in the decay of hot nuclei.

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confidence: 87%

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confidence: 92%

mentioning

confidence: 99%

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Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

Casini¹,

Piantelli²,

Maurenzig³

et al. 2012

Phys. Rev. C

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“…This is true if the expansion energy per nucleon does not depend on the initial isospin of the system, at a given incident energy. Isospin differences between systems thus seem to survive preequilibrium emission [28].…”

Section: B Fragment Kinetic Energiesmentioning

confidence: 99%

New isospin effects in central heavy-ion collisions at Fermi energies

et al. 2012

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Isospin effects on multifragmentation properties were studied thanks to nuclear collisions between different isotopes of xenon beams and tin targets. It is shown that, in central collisions leading to multifragmentation, the mean number of fragments and their mean kinetic energy increase with the neutron-richness of the total system. Comparisons with a stochastic transport model allow to attribute the multiplicity increase to the multifragmentation stage, before secondary decay. The total charge bound in fragments is proposed as an alternate variable to quantify preequilibrium emission and to investigate symmetry energy effects.

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“…Recently, staggering effects have been observed also in heavy ion collisions from few MeV/nucleon up to Fermi energies (15 ≤E/A≤ 50 MeV/nucleon) [22,23,24,25,26,27,28,29,30]. These experiments have stirred renewed interest in staggering phenomena.…”

Section: Introductionmentioning

confidence: 99%

Methods for a quantitative evaluation of odd-even staggering effects

Olmi¹,

Piantelli²

2015

Eur. Phys. J. A

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Abstract. Odd-even effects, also known as staggering effects, are a common feature observed in the yield distributions of fragments produced in different types of nuclear reactions. We review old methods, and we propose new ones, for a quantitative estimation of these effects as a function of proton or neutron number of the reaction products. All methods are compared on the basis of Monte Carlo simulations. We find that some are not well suited for the task, the most reliable ones being those based either on a non-linear fit with a properly oscillating function or on a third (or fourth) finite difference approach. In any case, high statistic is of paramount importance to avoid that spurious structures appear just because of statistical fluctuations in the data and of strong correlations among the yields of neighboring fragments.

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Even-odd effects inZandNdistributions of fragments emitted at intermediate energies

Cited by 41 publications

References 31 publications

Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

Persistence of odd-even staggering in charged-fragment yields from112Sn+58Ni collisions at 35 MeV/nucleon

New isospin effects in central heavy-ion collisions at Fermi energies

Methods for a quantitative evaluation of odd-even staggering effects

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