Persistence of odd-even staggering in charged-fragment yields from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>112</mml:mn></mml:msup></mml:math>Sn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>58</mml:mn></mml:msup></mml:math>Ni collisions at 35 MeV/nucleon

Casini, G.; Piantelli, S.; Maurenzig, P. R.; Olmi, A.; Bardelli, L.; Barlini, S.; Benelli, M.; Bini, M.; Calviani, M.; Marini, P.; Mangiarotti, A.; Pasquali, G.; Poggi, G.; Stefanini, A. A.; Bruno, M.; Morelli, L.; Kravchuk, V. L.; Amorini, F.; Auditore, L.; Cardella, G.; Filippo, E. De; Galichet, E.; Guidara, E. La; Lanzalone, G.; Lanzanó, G.; Maiolino, C.; Pagano, A.; Papa, M.; Pirrone, S.; Politi, G.; Pop, A.; Porto, F.; Rizzo, F.; Russotto, P.; Santonocito, D.; Trifiró, A.; Trimarchi, M.

doi:10.1103/physrevc.86.011602

Cited by 30 publications

(11 citation statements)

References 24 publications

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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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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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“…Since particle production yields, including fission fragments, correlate strongly with the binding energy, measured fragment cross sections exhibit OES effects. Sawtooth-shaped charge correlations, based on the Z distributions of fragments produced in different reaction mechanisms including fission and multifragmentation, have been reported [15][16][17]. Much of the previous work focused on staggering as a function of the atomic number, Z, because most experimental data was limited to only elemental identification.…”

Section: Introductionmentioning

confidence: 99%

Influence of secondary decay on odd-even staggering of fragment cross sections

2013

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Odd-Even Staggering (OES) appears in many areas of nuclear physics, and is generally associated with the pairing term in the nuclear binding energy. To explore this effect, we use the Improved Statistical Multifragmentation Model to populate an ensemble of hot primary fragments, which are then de-excited using the Weisskopf-Ewing statistical emission formalism. The yields are then compared to experimental data. Our results show that, before secondary decay, OES appears only in the yields of even mass fragments and not in the yields of odd mass fragments. De-excitation of the hot fragments must be taken into account to describe the data, suggesting that the OES in fragment yields is a useful criterion for validating or adjusting theoretical de-excitation models.

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“…The larger pairing energy clearly leads to more important odd-even effects and, therefore, the analyses made in Refs. [18][19][20][21][22] may be helpful in finding the best parameterization for the pairing term, but this requires a careful treatment of the deexcitation of the primary fragments in order to minimize ambiguities.…”

Section: /2mentioning

confidence: 99%

“…Odd-even effects on the fragment charge distributions produced in different reactions have been recently reported in the literature [18][19][20][21][22]. Analyses based on the fragmentation of the quasi-projectile have been made at relativistic energies [18] as well as at much lower bombarding energies [21].…”

Section: Introductionmentioning

confidence: 99%

“…The study of central and semi-peripheral collisions carried out in Ref. [20] shows that important odd-even effects are observed for fragments with Z < 15 and, in the case of peripheral collisions, they can be observed up to Z = 40. On the other hand, other experimental results [22] reveal that these effects rapidly decrease as the fragment size increases.…”

Section: Introductionmentioning

confidence: 99%

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