JOPSS - Search Results

Journal Articles

Conceptual study on parasitic low-energy RI beam production with in-flight separator BigRIPS and the first stopping examination for high-energy RI beams in the parasitic gas cell

Sonoda, Tetsu*; Katayama, Ichiro*; Wada, Michiharu*; Iimura, Hideki; Sonnenschein, V.*; Iimura, Shun*; Takamine, Aiko*; Rosenbusch, M.*; Kojima, Takao*; Ahn, D. S.*; et al.

Progress of Theoretical and Experimental Physics (Internet), 2019(11), p.113D02_1 - 113D02_12, 2019/11

AA2019-0315.pdf:1.37MB

https://doi.org/10.1093/ptep/ptz120

Times Cited Count：1 Percentile：11.61(Physics, Multidisciplinary)

An in-flight separator, BigRIPS, at RIBF in RIKEN provides each experiment with specific nuclides separated from many nuclides produced by projectile fragmentation or in-flight fission. In this process, nuclides other than separated ones are discarded on the slits in BigRIPS, although they include many nuclides interested from the view point of nuclear structure. In order to extract these nuclides for parasitic experiments, we are developing a method using laser ion-source (PALIS). A test experiment with $^{78}$ Se beam from RIBF has been performed by using a gas cell set in BigRIPS. Unstable nuclides around $^{67}$ Se were stopped in the gas cell in accordance with a calculation using LISE code. The stopping efficiency has been estimated to be about 30%. As a next step, we will establish the technique for extracting reaction products from the gas cell.

Journal Articles

Radiation measurement and analysis

Wakaida, Ikuo; Hasegawa, Shuichi*; Tadokoro, Takahiro*

Nihon Kikai Gakkai-Shi, 122(1211), p.18 - 20, 2019/10

no abstracts in English

Journal Articles

The Laser and optical system for the RIBF-PALIS experiment

Sonoda, Tetsu*; Iimura, Hideki; Reponen, M.*; Wada, Michiharu*; Katayama, Ichiro*; Sonnenschein, V.*; Takamatsu, Takahide*; Tomita, Hideki*; Kojima, Takao*

Nuclear Instruments and Methods in Physics Research A, 877, p.118 - 123, 2018/01

https://doi.org/10.1016/j.nima.2017.09.055

Times Cited Count：4 Percentile：38.58(Instruments & Instrumentation)

In order to produce low-energy RI beams at RIKEN RIBF, a laser ion source, PALIS, is under construction. This ion source is based on resonance ionization of RI atoms captured in Ar gas. Because the ion source is located 70m away from lasers, we have developed an optical system for laser beam transport. This system can be controlled remotely when the ion source is not accessible because of high radiation level. The position of laser beam after transport is reasonably stable, and the transport efficiency is about 50%.

JAEA Reports

Determination of the $^{40}$ Ca ionization potential by high-precision three-step resonance ionization spectroscopy

Miyabe, Masabumi; Oba, Masaki; Kato, Masaaki; Wakaida, Ikuo; Watanabe, Kazuo

JAERI-Research 2004-023, 17 Pages, 2004/11

JAERI-Research-2004-023.pdf:2.71MB

High precision resonance ionization spectroscopy has been applied to determination of an accurate ionization potential of $^{40}$ Ca. Three-step resonant excitation with single-mode extended cavity diode lasers populates a series of ( $^{1}$ P $_{1}$ ) and ( $^{1}$ F $_{3}$ ) Rydberg states in the rage of =20-150. By using an extended Ritz formula for quantum defect, the series convergence limit has been determined to be 49305.9240 (20) cm $^{-1}$ with the accuracy improved one order of magnitude higher than previously reported ones.