| Project/Area Number |
25247039
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
小田原 厚子 大阪大学, 理学(系)研究科(研究院), 准教授 (30264013)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
IMAI Nobuaki 東京大学, 大学院理学系研究科附属原子核科学研究センター, 准教授 (80373273)
MIYATAKE Hiroari 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (50190799)
HIRAYAMA Yoshikazu 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (30391733)
|
|---|
| Research Collaborator |
LEVY Phil TRIUMF, Resonant Ionization Laser Ion Source group, Senior Scientist
PEARSON Matt TRIUMF, Laser Spectroscopy group, Senior Scientist
KIMURA Masaaki 北海道大学, 大学院理学研究院, 准教授
|
|---|
| Project Period (FY) |
2013-04-01 – 2017-03-31
|
| Project Status |
Completed (Fiscal Year 2016)
|
| Budget Amount *help |
¥42,120,000 (Direct Cost: ¥32,400,000、Indirect Cost: ¥9,720,000)
Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2014: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2013: ¥28,990,000 (Direct Cost: ¥22,300,000、Indirect Cost: ¥6,690,000)
|
|---|
| Keywords | 中性子超過剰核 / 中性子魔法数20 / スピン偏極不安定核ビーム / ベータ・ガンマ・中性子核分光法 / 30Mg, 31Mg核の構造 / スピン・パリティ / 変形共存の実験的証明 / 新奇レーザー分光法の開発 / 中性子過剰核 / 偏極31Na核ビーム / ベータ・ガンマ核分光 / 31Mgの構造 / 新たなレーザー分光法の開発 / 32Mg核の構造 / スピン偏極核分光 / 新たなレーザー分光法 / 32Na原子の超微細構造 / 32Mgの核構造 / 32Na核のベータ崩壊 / 変形状態 / ベータ遅発中性子放出 / island of inversion / 31Mgの核構造 / ベータ遅発崩壊 / ガンマ線遷移 / 中性子崩壊 / スピン偏極 / レーザー光ポンピング / ガンマ線 / 中性子 |
|---|
| Outline of Final Research Achievements |
The structures of very neutron-rich nuclei have been attracting much attention. One of the highlights is the coexistence of various structures in nuclei with the nucleon numbers close to the magic numbers, as a result of competition between the spherical mean field which favors spherical shapes and the nuclear correlation which favors deformed shapes. However, the experimental knowledge on the level scheme is very limited.
We have developed a unique method to precisely investigate the nuclear structures by the beta-gamma-neutron spectroscopy with spin-polarized radioactive nuclear beams at TRIUMF. We have successfully established very detailed level schemes of the neutron-rich nuclei 30Mg and 31Mg with neutron numbers close to the neutron magic number 20. It is clearly shown the experimental evidences for the shape coexistence in 30Mg and 31Mg for the first time.
|
