Analyses of Hypernuclei Produced Via Fission and Evaporation

Yıl 2021, Cilt: 47 Sayı: 1, 102 - 109, 30.04.2021

Sıddıka Nihal Koyuncu , Nihal Büyükçizmeci

https://doi.org/10.35238/sufefd.896697

Öz

In heavy-ion reactions, nuclei and hypernuclei yields can be emitted from target/projectile redisuals in peripheral collisions. The evaporation and fission yields are investigated at 0.25-2.5 MeV/nucleon excitation energy intervals for source nuclei 235U, 235_Lambda_U, 235_2Lambda_U, 235_3Lambda_U, 235_4Lambda_U, 168Ho, 168_Lambda_Ho, 168_2Lambda_Ho, 168_3Lambda_Ho ve 168_4Lambda_Ho. We have reproduced mass distributions via computer codes by using hyper-SMM model which is based on the statistical multifragmentation model for hypernuclei. Our results can be used for the analyses of the future experiments at FAIR(GSI) and NICA(Dubna).

Anahtar Kelimeler

evaporation, fission, hypernuclei, statistical multifragmentation model

Destekleyen Kurum

TÜBİTAK

Proje Numarası

118F111

Teşekkür

Many helpful discussions with AS Botvina, R Ogul and A Kaya are gratefully acknowledged. This study is prepared from Master Thesis of S.N. Koyuncu at Graduate School of Natural Science of Selcuk University, supported by Scientific and Technological Research Council of Turkey (TUBITAK), under Project No. 118F111, and has been performed in the framework of COST Action CA15213 THOR.

Fisyon ve Buharlaşma ile Üretilen Hiperçekirdeklerin Analizi

Öz

Ağır iyon reaksiyonlarında çekirdekler ve hiperçekirdekler yanal çarpışmalarda hedef/mermi çekirdek artıklarından saçılabilir. 235U, 235_Lambda_U, 235_2Lambda_U, 235_3Lambda_U, 235_4Lambda_U, 168Ho, 168_Lambda_Ho, 168_2Lambda_Ho, 168_3Lambda_Ho ve 168_4Lambda_Ho kaynak çekirdekleri için 0.25-2.5 MeV/nükleon uyarma enerji aralıklarında buharlaşma ve fisyon ürünleri araştırılmıştır. Hiperçekirdekler için istatistiksel çok katlı parçalanma modeli temelinde hiper-SMM modelini kullanarak bilgisayar kodlarıyla kütle dağılımlarını elde ettik. Sonuçlarımız FAIR (GSI) ve NICA (Dubna)’daki gelecek deneylerin analizlerinde kullanılabilecektir.

Anahtar Kelimeler

Buharlaşma, Fisyon, Hiperçekirdekler, Istatistiksel Çok Katlı Parçalanma Modeli

Proje Numarası

118F111

Kaynakça

• Bondorf JP, Botvina AS, Iljinov AS, Mishustin IN, and Sneppen K (1995). Statistical multifragmentation of nuclei. Phys. Rep. 257: 133-221.
• Botvina AS et al. (1995). Multifragmentation of spectators in relativistic heavy-ion reactions. Nucl. Phys. A 584: 737.
• Botvina AS, Buyukcizmeci N, Ergun A, Ogul R, Bleicher M, Pochodzalla J (2016). Formation of hypernuclei in evaporation and fission processes. Phys. Rev. C. 94: 054615.
• Botvina AS, Iljinov AS, Mishustin IN, Bondorf J, Donangelo R, Sneppen K (1987). Statistical simulation of the break-up of highly excited nuclei. Nucl. Phys. A 475(4): 663-686.
• Botvina, A.S. and Pochodzalla J (2007). Production of hypernuclei in multifragmentation of nuclear spectator matter”. Phys. Rev. C 76: 024909.
• Buyukcizmeci N, Botvina AS, Ergun A, Ogul R, Bleicher M (2018). Statistical production and binding energy of hypernuclei. Phys. Rev. C. 98: 064603.
• Buyukcizmeci N, Botvina AS, Ogul R, Ergun A, Bleicher M (2019). Production of ΛΛ-hypernuclei and evaluation of their binding energies via the double yield ratio. Eur. Phys. J. A 55(2): 1.
• Buyukcizmeci N, Botvina AS, Pochodzalla J and Bleicher M (2013). Mechanisms for the production of hypernuclei beyond the neutron and proton drip lines. Phys. Rev. C 88: 014611.
• Buyukcizmeci N, Ogul R, and Botvina AS (2005). Isospin and symmetry energy effects on nuclear fragment production in liquid-gas-type phase transition region. Eur. Phys. J. A 25: 57.
• Buyukcizmeci N, Ogul R, Botvina AS, Bleicher M (2020). On the survey of nuclei and hypernuclei in multifragmentation. Phys. Scr. 95: 075311. Hashimoto O and Tamura H (2006). Spectroscopy of hypernuclei. Prog. Part. Nucl. Phys. 57: 564.
• Eren N, Buyukcizmeci N, Ogul (2007). Mass distributions of nuclear disintegration from fission to evaporation. Phys. Scr. 76: 657.
• Eren N, Buyukcizmeci N, Ogul R, Botvina AS 8 (2013). Mass distribution in the disintegration of heavy nuclei. Eur. Phys. J. A 49: 48.
• Imal H, Ergun A, Buyukcizmeci N, Ogul R, Botvina AS, and Trautmann W (2015). Theoretical study of projectile fragmentation in the 112Sn+112Sn and 124Sn+124Sn reactions at 1 GeV/nucleon. Phys. Rev. C 91: 034605.
• Karnaukhov VA et al. (2008). Critical temperature for the nuclear liquid-gas phase transition (from multifragmentation and fission). Physics of Atomic Nuclei 71: 2067.
• Kreutz P et al., (1993). Charge correlations as a probe of nuclear disassembly. Nucl. Phys. A 556: 672. Li B -A, DeAngelis AR, and Gross DHE (1993). Statistical model analysis of ALADIN multifragmentation data. Phys. Lett. B 303: 225.
• Ogul R et al. (2011). Isospin-dependent multifragmentation of relativistic projectiles. Phys. Rev. C 83: 024608.
• Pienkowski L, Kwiatkowski K, Lefort T, Hsi W -c, Beaulieu L, Viola VE et al. (2002). Breakup time scale studied in the 8 GeV/cπ−+197Au reaction. Phys. Rev. C 65: 064606.
• Schaffner J, Dover CB, Gal A, Greiner C and Stoecker H (1993). Strange hadronic matter. Phys. Rev. Lett., 71: 1328.
• Scharenberg RP, Srivastava BK, Albergo S, Bieser F, Brady FP, Caccia Z et al., (2001). Comparison of 1AGeV 197Au+C data with thermodynamics: The nature of the phase transition in nuclear multifragmentation. Phys. Rev. C 64: 054602.
• Special issue on Progress in Strangeness Nuclear Physics (2012). Edt. Gal A, Hashimoto O and Pochodzalla J, Nucl. Phys. A 881: 1-338.
• Viola VE et al. (2001). Signals for the transition from liguid to gas in hot nuclei. Nucl. Phys. A 681: 267c.
• Xi H et al. (1997). Breakup temperature of target spectators in 197Au + 197Au collisions at E/A=1000 MeV. Z. Phys. A 359: 97–67.