Predictions of the decay properties of the superheavy nuclei 293, 294119 and 294, 295120
BackgroundTo date, various nuclides up to Z = 118 have been discovered and synthesized, raising the challenge of synthesizing nuclides with Z ≥ 119. Recently, the fusion-evaporation reactions 243Am54Cr, xn119297-x and 243Am55Mn, xn120298-x have been suggested as methods for synthesizing new elements...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Science Press
2023-08-01
|
| Series: | He jishu |
| Subjects: | |
| Online Access: | http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2023.hjs.46.080011&lang=zh |
| _version_ | 1797737256210923520 |
|---|---|
| author | WANG Zhen REN Zhongzhou |
| author_facet | WANG Zhen REN Zhongzhou |
| author_sort | WANG Zhen |
| collection | DOAJ |
| description | BackgroundTo date, various nuclides up to Z = 118 have been discovered and synthesized, raising the challenge of synthesizing nuclides with Z ≥ 119. Recently, the fusion-evaporation reactions 243Am54Cr, xn119297-x and 243Am55Mn, xn120298-x have been suggested as methods for synthesizing new elements with Z = 119 and 120. As α-decay is a powerful tool for the identification of new elements or nuclides, accurate predictions of the α-decay properties of the reaction products could be a useful reference for future experiments.PurposeThis study aims to provide quantitative predictions of the α-decay, spontaneous fission, and β-decay half-lives for the α-decay chains of 293, 294119 and 294, 295120 and to demonstrate the competition between the decay modes for these nuclei.MethodsAn improved density-dependent cluster model (DDCM+) is used to calculate the α-decay half-lives, taking the anisotropy of the surface diffuseness into account. The spontaneous fission half-lives are calculated using the Karpov formula, which is related to the fissility parameter and fission barrier height of the potential energy surface. The β-decay half-lives are determined using a finite-range droplet model (FRDM).ResultsThe predictive α-decay half-lives for the α-decay chains of 293, 294119 and 294, 295120 are obtained using the DDCM+ model, and the theoretical half-lives of the spontaneous fission and β-decay for these nuclides are also presented.ConclusionsFor the α-decay chains of 293, 294119 and 294, 295120, α-decay is predicted to be the dominant decay mode for most of the nuclei, while the half-lives of spontaneous fission and β-decay are predicted to be comparable to those of the α-decay near the region of A = 261. We expect that these results will serve as a useful reference for the synthesis of new isotopes in the future. |
| first_indexed | 2024-03-12T13:26:59Z |
| format | Article |
| id | doaj.art-efe6457cf617438ea38391d2454d5344 |
| institution | Directory Open Access Journal |
| issn | 0253-3219 |
| language | zho |
| last_indexed | 2024-03-12T13:26:59Z |
| publishDate | 2023-08-01 |
| publisher | Science Press |
| record_format | Article |
| series | He jishu |
| spelling | doaj.art-efe6457cf617438ea38391d2454d53442023-08-25T06:53:02ZzhoScience PressHe jishu0253-32192023-08-0146808001108001110.11889/j.0253-3219.2023.hjs.46.0800110253-3219（2023）08-0114-07Predictions of the decay properties of the superheavy nuclei 293, 294119 and 294, 295120WANG Zhen0REN Zhongzhou1School of Physics Science and Engineering, Tongji University, Shanghai 200092, ChinaSchool of Physics Science and Engineering, Tongji University, Shanghai 200092, ChinaBackgroundTo date, various nuclides up to Z = 118 have been discovered and synthesized, raising the challenge of synthesizing nuclides with Z ≥ 119. Recently, the fusion-evaporation reactions 243Am54Cr, xn119297-x and 243Am55Mn, xn120298-x have been suggested as methods for synthesizing new elements with Z = 119 and 120. As α-decay is a powerful tool for the identification of new elements or nuclides, accurate predictions of the α-decay properties of the reaction products could be a useful reference for future experiments.PurposeThis study aims to provide quantitative predictions of the α-decay, spontaneous fission, and β-decay half-lives for the α-decay chains of 293, 294119 and 294, 295120 and to demonstrate the competition between the decay modes for these nuclei.MethodsAn improved density-dependent cluster model (DDCM+) is used to calculate the α-decay half-lives, taking the anisotropy of the surface diffuseness into account. The spontaneous fission half-lives are calculated using the Karpov formula, which is related to the fissility parameter and fission barrier height of the potential energy surface. The β-decay half-lives are determined using a finite-range droplet model (FRDM).ResultsThe predictive α-decay half-lives for the α-decay chains of 293, 294119 and 294, 295120 are obtained using the DDCM+ model, and the theoretical half-lives of the spontaneous fission and β-decay for these nuclides are also presented.ConclusionsFor the α-decay chains of 293, 294119 and 294, 295120, α-decay is predicted to be the dominant decay mode for most of the nuclei, while the half-lives of spontaneous fission and β-decay are predicted to be comparable to those of the α-decay near the region of A = 261. We expect that these results will serve as a useful reference for the synthesis of new isotopes in the future.http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2023.hjs.46.080011&lang=zhα-decayspontaneous fissionsuperheavy nucleihalf-life |
| spellingShingle | WANG Zhen REN Zhongzhou Predictions of the decay properties of the superheavy nuclei 293, 294119 and 294, 295120 He jishu α-decay spontaneous fission superheavy nuclei half-life |
| title | Predictions of the decay properties of the superheavy nuclei 293, 294119 and 294, 295120 |
| title_full | Predictions of the decay properties of the superheavy nuclei 293, 294119 and 294, 295120 |
| title_fullStr | Predictions of the decay properties of the superheavy nuclei 293, 294119 and 294, 295120 |
| title_full_unstemmed | Predictions of the decay properties of the superheavy nuclei 293, 294119 and 294, 295120 |
| title_short | Predictions of the decay properties of the superheavy nuclei 293, 294119 and 294, 295120 |
| title_sort | predictions of the decay properties of the superheavy nuclei 293 294119 and 294 295120 |
| topic | α-decay spontaneous fission superheavy nuclei half-life |
| url | http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2023.hjs.46.080011&lang=zh |
| work_keys_str_mv | AT wangzhen predictionsofthedecaypropertiesofthesuperheavynuclei293294119and294295120 AT renzhongzhou predictionsofthedecaypropertiesofthesuperheavynuclei293294119and294295120 |