Determination of fusion barrier distributions from quasielastic scattering cross sections towards superheavy nuclei synthesis

Taiki Tanaka, Yoshihiro Narikiyo, Kosuke Morita, Kunihiro Fujita, Daiya Kaji, Kouji Morimoto, Sayaka Yamaki, Yasuo Wakabayashi, Kengo Tanaka, Mirei Takeyama, Akira Yoneda, Hiromitsu Haba, Yukiko Komori, Shinya Yanou, Benoît Jean Paul Gall, Zouhair Asfari, Hugo Faure, Hiroo Hasebe, Minghui Huang, Jumpei KanayaMasashi Murakami, Atsushi Yoshida, Takayuki Yamaguchi, Fuyuki Tokanai, Tomomi Yoshida, Shoya Yamamoto, Yuki Yamano, Kenyu Watanabe, Satoshi Ishizawa, Masato Asai, Ryuji Aono, Shin Ichi Goto, Kenji Katori, Kouichi Hagino

研究成果: ジャーナルへの寄稿記事

4 引用 (Scopus)

抄録

In order to study the nucleus-nucleus interactions for syntheses of superheavy nuclei, we measured excitation functions for the quasielastic scattering of 48 Ca+ 208 Pb, 50 Ti+ 208 Pb, and 48 Ca+ 248 Cm using the gas-filled-type recoil ion separator GARIS. The quasielastic scattering events were clearly separated from deep-inelastic events by using GARIS and its focal plan detectors, except for high-incident-energy points. The quasielastic barrier distributions were successfully extracted for these systems, and compared with coupled-channels calculations. The results of the calculations indicate that vibrational and rotational excitations of the colliding nuclei, as well as neutron transfers before contact, strongly affect the structure of the barrier distribution. For the reactions of 48 Ca+ 208 Pb and 50 Ti+ 208 Pb, a local maximum of the barrier distribution occurred at the same energy as the peak of the 2n evaporation cross section of the system. On the other hand, for the hot fusion reaction of 48 Ca+ 248 Cm, the 4n evaporation cross section of the system peaks at energies well above the maximum of the barrier distribution. This may be attributed to the deformation of the target nucleus. We argue that these findings can be utilized to locate the optimal energy for future searches for undiscovered superheavy nuclei.

元の言語英語
記事番号014201
ジャーナルjournal of the physical society of japan
87
発行部数1
DOI
出版物ステータス出版済み - 1 1 2018

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scattering cross sections
fusion
nuclei
synthesis
evaporation
recoil ions
energy
cross sections
separators
scattering
excitation
neutrons
detectors
gases
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Determination of fusion barrier distributions from quasielastic scattering cross sections towards superheavy nuclei synthesis. / Tanaka, Taiki; Narikiyo, Yoshihiro; Morita, Kosuke; Fujita, Kunihiro; Kaji, Daiya; Morimoto, Kouji; Yamaki, Sayaka; Wakabayashi, Yasuo; Tanaka, Kengo; Takeyama, Mirei; Yoneda, Akira; Haba, Hiromitsu; Komori, Yukiko; Yanou, Shinya; Gall, Benoît Jean Paul; Asfari, Zouhair; Faure, Hugo; Hasebe, Hiroo; Huang, Minghui; Kanaya, Jumpei; Murakami, Masashi; Yoshida, Atsushi; Yamaguchi, Takayuki; Tokanai, Fuyuki; Yoshida, Tomomi; Yamamoto, Shoya; Yamano, Yuki; Watanabe, Kenyu; Ishizawa, Satoshi; Asai, Masato; Aono, Ryuji; Goto, Shin Ichi; Katori, Kenji; Hagino, Kouichi.

:: journal of the physical society of japan, 巻 87, 番号 1, 014201, 01.01.2018.

研究成果: ジャーナルへの寄稿記事

Tanaka, T, Narikiyo, Y, Morita, K, Fujita, K, Kaji, D, Morimoto, K, Yamaki, S, Wakabayashi, Y, Tanaka, K, Takeyama, M, Yoneda, A, Haba, H, Komori, Y, Yanou, S, Gall, BJP, Asfari, Z, Faure, H, Hasebe, H, Huang, M, Kanaya, J, Murakami, M, Yoshida, A, Yamaguchi, T, Tokanai, F, Yoshida, T, Yamamoto, S, Yamano, Y, Watanabe, K, Ishizawa, S, Asai, M, Aono, R, Goto, SI, Katori, K & Hagino, K 2018, 'Determination of fusion barrier distributions from quasielastic scattering cross sections towards superheavy nuclei synthesis', journal of the physical society of japan, 巻. 87, 番号 1, 014201. https://doi.org/10.7566/JPSJ.87.014201
Tanaka, Taiki ; Narikiyo, Yoshihiro ; Morita, Kosuke ; Fujita, Kunihiro ; Kaji, Daiya ; Morimoto, Kouji ; Yamaki, Sayaka ; Wakabayashi, Yasuo ; Tanaka, Kengo ; Takeyama, Mirei ; Yoneda, Akira ; Haba, Hiromitsu ; Komori, Yukiko ; Yanou, Shinya ; Gall, Benoît Jean Paul ; Asfari, Zouhair ; Faure, Hugo ; Hasebe, Hiroo ; Huang, Minghui ; Kanaya, Jumpei ; Murakami, Masashi ; Yoshida, Atsushi ; Yamaguchi, Takayuki ; Tokanai, Fuyuki ; Yoshida, Tomomi ; Yamamoto, Shoya ; Yamano, Yuki ; Watanabe, Kenyu ; Ishizawa, Satoshi ; Asai, Masato ; Aono, Ryuji ; Goto, Shin Ichi ; Katori, Kenji ; Hagino, Kouichi. / Determination of fusion barrier distributions from quasielastic scattering cross sections towards superheavy nuclei synthesis. :: journal of the physical society of japan. 2018 ; 巻 87, 番号 1.
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title = "Determination of fusion barrier distributions from quasielastic scattering cross sections towards superheavy nuclei synthesis",
abstract = "In order to study the nucleus-nucleus interactions for syntheses of superheavy nuclei, we measured excitation functions for the quasielastic scattering of 48 Ca+ 208 Pb, 50 Ti+ 208 Pb, and 48 Ca+ 248 Cm using the gas-filled-type recoil ion separator GARIS. The quasielastic scattering events were clearly separated from deep-inelastic events by using GARIS and its focal plan detectors, except for high-incident-energy points. The quasielastic barrier distributions were successfully extracted for these systems, and compared with coupled-channels calculations. The results of the calculations indicate that vibrational and rotational excitations of the colliding nuclei, as well as neutron transfers before contact, strongly affect the structure of the barrier distribution. For the reactions of 48 Ca+ 208 Pb and 50 Ti+ 208 Pb, a local maximum of the barrier distribution occurred at the same energy as the peak of the 2n evaporation cross section of the system. On the other hand, for the hot fusion reaction of 48 Ca+ 248 Cm, the 4n evaporation cross section of the system peaks at energies well above the maximum of the barrier distribution. This may be attributed to the deformation of the target nucleus. We argue that these findings can be utilized to locate the optimal energy for future searches for undiscovered superheavy nuclei.",
author = "Taiki Tanaka and Yoshihiro Narikiyo and Kosuke Morita and Kunihiro Fujita and Daiya Kaji and Kouji Morimoto and Sayaka Yamaki and Yasuo Wakabayashi and Kengo Tanaka and Mirei Takeyama and Akira Yoneda and Hiromitsu Haba and Yukiko Komori and Shinya Yanou and Gall, {Beno{\^i}t Jean Paul} and Zouhair Asfari and Hugo Faure and Hiroo Hasebe and Minghui Huang and Jumpei Kanaya and Masashi Murakami and Atsushi Yoshida and Takayuki Yamaguchi and Fuyuki Tokanai and Tomomi Yoshida and Shoya Yamamoto and Yuki Yamano and Kenyu Watanabe and Satoshi Ishizawa and Masato Asai and Ryuji Aono and Goto, {Shin Ichi} and Kenji Katori and Kouichi Hagino",
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T1 - Determination of fusion barrier distributions from quasielastic scattering cross sections towards superheavy nuclei synthesis

AU - Tanaka, Taiki

AU - Narikiyo, Yoshihiro

AU - Morita, Kosuke

AU - Fujita, Kunihiro

AU - Kaji, Daiya

AU - Morimoto, Kouji

AU - Yamaki, Sayaka

AU - Wakabayashi, Yasuo

AU - Tanaka, Kengo

AU - Takeyama, Mirei

AU - Yoneda, Akira

AU - Haba, Hiromitsu

AU - Komori, Yukiko

AU - Yanou, Shinya

AU - Gall, Benoît Jean Paul

AU - Asfari, Zouhair

AU - Faure, Hugo

AU - Hasebe, Hiroo

AU - Huang, Minghui

AU - Kanaya, Jumpei

AU - Murakami, Masashi

AU - Yoshida, Atsushi

AU - Yamaguchi, Takayuki

AU - Tokanai, Fuyuki

AU - Yoshida, Tomomi

AU - Yamamoto, Shoya

AU - Yamano, Yuki

AU - Watanabe, Kenyu

AU - Ishizawa, Satoshi

AU - Asai, Masato

AU - Aono, Ryuji

AU - Goto, Shin Ichi

AU - Katori, Kenji

AU - Hagino, Kouichi

PY - 2018/1/1

Y1 - 2018/1/1

N2 - In order to study the nucleus-nucleus interactions for syntheses of superheavy nuclei, we measured excitation functions for the quasielastic scattering of 48 Ca+ 208 Pb, 50 Ti+ 208 Pb, and 48 Ca+ 248 Cm using the gas-filled-type recoil ion separator GARIS. The quasielastic scattering events were clearly separated from deep-inelastic events by using GARIS and its focal plan detectors, except for high-incident-energy points. The quasielastic barrier distributions were successfully extracted for these systems, and compared with coupled-channels calculations. The results of the calculations indicate that vibrational and rotational excitations of the colliding nuclei, as well as neutron transfers before contact, strongly affect the structure of the barrier distribution. For the reactions of 48 Ca+ 208 Pb and 50 Ti+ 208 Pb, a local maximum of the barrier distribution occurred at the same energy as the peak of the 2n evaporation cross section of the system. On the other hand, for the hot fusion reaction of 48 Ca+ 248 Cm, the 4n evaporation cross section of the system peaks at energies well above the maximum of the barrier distribution. This may be attributed to the deformation of the target nucleus. We argue that these findings can be utilized to locate the optimal energy for future searches for undiscovered superheavy nuclei.

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