Precision isochronous mass measurements at the storage ring CSRe in Lanzhou
- Tu, X.
- Wang, M.
- Litvinov, Y.
- Zhang, Y.
- Xu, H.
- Sun, Z.
- Audi, G.
- Blaum, K.
- Du, C.
- Huang, W.
- Hu, Z.
- Geng, P.
- Jin, S.
- Liu, L.
- Liu, Y.
- Mei, B.
- Mao, R.
- Ma, X.
- Suzuki, H.
- Shuai, P.
- Sun, Y.
- Tang, S.
- Wang, J.
- Wang, S.
- Xiao, G.
- Xu, X.
- Xia, J.
- Yang, J.
- Ye, R.
- Yamaguchi, T.
- Yan, X.
- Yuan, Y.
- Yamaguchi, Y.
- Zang, Y.
- Zhao, H.
- Zhao, T.
- Zhang, X.
- Zhou, X.
- Zhan, W.
DOIAbstract
Direct mass measurements of 78Kr projectile fragments have been performed in the recently commissioned storage ring CSRe employing the isochronous mass spectrometry method. A new data-analysis technique has been developed to correct the drifts in the revolution frequencies caused by instabilities of the magnetic fields in the CSRe, thus yielding a mass resolving power of R=m/Δm≈1.7×105 (sigma). Masses for 45V, 47Cr, 49Mn and 51Fe nuclei are determined with a relative mass precision of δm/m≈2×10−7 (sigma) which is an improvement by a factor of ∼2 compared to the literature values
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