Development of Ultracold Francium Atomic Sources Towards the Permanent EDM Search

Tomohiro Hayamizu; Hiromitsu Haba; Keisuke Nakamura; Takatoshi Aoki; Hiroki Nagahama; Kazuo S. Tanaka; Naoya Ozawa; Miki Ohtsuka; Yasuhiro Sakemi

doi:10.1007/s00601-021-01710-4

Development of Ultracold Francium Atomic Sources Towards the Permanent EDM Search

Tomohiro Hayamizu^*, Hiromitsu Haba, Keisuke Nakamura, Takatoshi Aoki, Hiroki Nagahama, Kazuo S. Tanaka, Naoya Ozawa, Miki Ohtsuka, Yasuhiro Sakemi

^*Corresponding author for this work

Waseda University Honjo Senior High School

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Francium (Fr), which is the alkali atom in the 7th period, can be obtained as ultracold atoms with laser cooling and trapping techniques, and could be employed for the experiments on searches for the permanent electric dipole moment (EDM) of an electron. In order to improve the sensitivity of the electron EDM search, development of a high-intensity source of Fr atoms is essential. We demonstrated a production of a high intensity ²¹⁰Fr ion beam with a rate of 5 × 10 ⁶ ions/s by a fusion reaction with bombardment of an accelerated ¹⁸O beam onto a fixed gold target in RIKEN. The Fr products inside the gold target were extracted from the gold surface as an ion beam focused with an electrostatic field. We also discussed the method to produce ²²¹Fr by α-decay of ²²⁵Ac. A neutron-rich ²²¹Fr isotope can be obtained as a daughter nucleus of this decay.

Original language	English
Article number	11
Journal	Few-Body Systems
Volume	63
Issue number	1
DOIs	https://doi.org/10.1007/s00601-021-01710-4
Publication status	Published - 2022 Mar

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Access to Document

10.1007/s00601-021-01710-4

Cite this

@article{a483d789cce84f9b97cbc6abc5fd14eb,

title = "Development of Ultracold Francium Atomic Sources Towards the Permanent EDM Search",

abstract = "Francium (Fr), which is the alkali atom in the 7th period, can be obtained as ultracold atoms with laser cooling and trapping techniques, and could be employed for the experiments on searches for the permanent electric dipole moment (EDM) of an electron. In order to improve the sensitivity of the electron EDM search, development of a high-intensity source of Fr atoms is essential. We demonstrated a production of a high intensity 210Fr ion beam with a rate of 5 × 10 6 ions/s by a fusion reaction with bombardment of an accelerated 18O beam onto a fixed gold target in RIKEN. The Fr products inside the gold target were extracted from the gold surface as an ion beam focused with an electrostatic field. We also discussed the method to produce 221Fr by α-decay of 225Ac. A neutron-rich 221Fr isotope can be obtained as a daughter nucleus of this decay.",

author = "Tomohiro Hayamizu and Hiromitsu Haba and Keisuke Nakamura and Takatoshi Aoki and Hiroki Nagahama and Tanaka, {Kazuo S.} and Naoya Ozawa and Miki Ohtsuka and Yasuhiro Sakemi",

note = "Funding Information: We thank Dr. Umakanth Dammarapati for helpful comments on the manuscript. This work was supported by JSPS KAKENHI Grant Numbers JP20K14503, JP19H05601, JP18K18762, and JP26220705. T. H. acknowledges support from Special Postdoctoral Researcher Program by RIKEN. Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.",

year = "2022",

month = mar,

doi = "10.1007/s00601-021-01710-4",

language = "English",

volume = "63",

journal = "Few-Body Systems",

issn = "0177-7963",

publisher = "Springer Wien",

number = "1",

}

TY - JOUR

T1 - Development of Ultracold Francium Atomic Sources Towards the Permanent EDM Search

AU - Hayamizu, Tomohiro

AU - Haba, Hiromitsu

AU - Nakamura, Keisuke

AU - Aoki, Takatoshi

AU - Nagahama, Hiroki

AU - Tanaka, Kazuo S.

AU - Ozawa, Naoya

AU - Ohtsuka, Miki

AU - Sakemi, Yasuhiro

N1 - Funding Information: We thank Dr. Umakanth Dammarapati for helpful comments on the manuscript. This work was supported by JSPS KAKENHI Grant Numbers JP20K14503, JP19H05601, JP18K18762, and JP26220705. T. H. acknowledges support from Special Postdoctoral Researcher Program by RIKEN. Publisher Copyright: © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.

PY - 2022/3

Y1 - 2022/3

N2 - Francium (Fr), which is the alkali atom in the 7th period, can be obtained as ultracold atoms with laser cooling and trapping techniques, and could be employed for the experiments on searches for the permanent electric dipole moment (EDM) of an electron. In order to improve the sensitivity of the electron EDM search, development of a high-intensity source of Fr atoms is essential. We demonstrated a production of a high intensity 210Fr ion beam with a rate of 5 × 10 6 ions/s by a fusion reaction with bombardment of an accelerated 18O beam onto a fixed gold target in RIKEN. The Fr products inside the gold target were extracted from the gold surface as an ion beam focused with an electrostatic field. We also discussed the method to produce 221Fr by α-decay of 225Ac. A neutron-rich 221Fr isotope can be obtained as a daughter nucleus of this decay.

AB - Francium (Fr), which is the alkali atom in the 7th period, can be obtained as ultracold atoms with laser cooling and trapping techniques, and could be employed for the experiments on searches for the permanent electric dipole moment (EDM) of an electron. In order to improve the sensitivity of the electron EDM search, development of a high-intensity source of Fr atoms is essential. We demonstrated a production of a high intensity 210Fr ion beam with a rate of 5 × 10 6 ions/s by a fusion reaction with bombardment of an accelerated 18O beam onto a fixed gold target in RIKEN. The Fr products inside the gold target were extracted from the gold surface as an ion beam focused with an electrostatic field. We also discussed the method to produce 221Fr by α-decay of 225Ac. A neutron-rich 221Fr isotope can be obtained as a daughter nucleus of this decay.

UR - http://www.scopus.com/inward/record.url?scp=85120961316&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85120961316&partnerID=8YFLogxK

U2 - 10.1007/s00601-021-01710-4

DO - 10.1007/s00601-021-01710-4

M3 - Article

AN - SCOPUS:85120961316

SN - 0177-7963

VL - 63

JO - Few-Body Systems

JF - Few-Body Systems

IS - 1

M1 - 11

ER -

Development of Ultracold Francium Atomic Sources Towards the Permanent EDM Search

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this