First ionization potential measurements of heavy actinides, lawrencium and nobelium

Sato, Tetsuya

The experimental determination of the first ionization potential (IP) yields information on the electronic structure of the element. We successfully ionized and mass-separated $^{257}$ No and $^{256}$ Lr with efficiencies ( $I_{rm eff}$ ) of (0.5 0.1)% and (36 7)% at 2800 K, respectively. From these $I_{rm eff}$ values, IP values of No and Lr were determined based on the relationship between $I_{rm eff}$ and IP. Our values are in good agreement with the predicted ones by theoretical calculations.

Language	:	English
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Meeting title	:	NUSTAR Week 2015
Held date	:	2015/09
Location (city)	:	Warsaw
Location (country)	:	Poland
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Keywords	:	重アクチノイド; イオン化エネルギー; ローレンシウム; ノーベリウム; 表面電離; オンライン同位体分離器(ISOL)
Research Facility	:	タンデム加速器
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Registration No. : BB20152465
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