NIM对γ＇_p及2e／h的SI值的最新测定结果  

A Recent Determination for the SI Values ofγ'_p and 2e/h at NIM

作　　者：刘瑞珉[1] 刘恒基[1] 金惕若[1] 鲁志荣 杜贤和[1] 薛寿清[1] 孔京文 于百江[1] 邹显安 刘铁斌 张伟[1] 

机构地区：[1]中国计量科学研究院

出　　处：《计量学报》1995年第3期161-168,共8页Acta Metrologica Sinica

摘　　要：中国计量科学研究院于１９９４年６月完成了对质子回旋磁比γ＇_ｐ及约瑟夫森频率与电压之商２ｅ／ｈ的ＳＩ值的新测定。结果分别为γ＇_ｐ（ａｂｓ）＝２．６７５１５３５（２３）×１０８Ｔ（－１）·ｓ（－１）和２ｅ／ｈ＝４８３５９７．８９（４３）ＧＨｚ／Ｖ，其不确定度分别为０．８６×１０（－６）和０．８８×１０（－６）。文中还对测量装置的改进作了介绍。A recent determination for the SI values of the gyromagnetic ratio of proton Yp' and the Josephson frequency-voltage quotient 2e/h were completed at NIM in June, 1994. The results are:Yp' (abs) = 2. 6751535(23)×108T(-1)s(-1) and 2e/h = 483597. 89(43) GHz/V with the uncertainties of 0. 86ppm and 0. 88ppmrespectively. Meanwhile, the improvements of the measurement apparatus are described in this paper.

关 键 词：质子回旋磁比 绝对测量 约瑟夫森常数 电压 

分 类 号：TB97[一般工业技术—计量学]