Harvard University

업종: Education

Number of terms: 3412

Number of blossaries: 0

Company Profile:

Harvard University is the oldest institution of higher learning in the United States. It was established in 1636 by the Massachusetts legislature and named after its first benefactor, John Harvard. Located in Cambridge, Massachusetts, Harvard University is an Ivy League university.

자세히

放射性

輻射、一般 α 粒子、 β 粒子或從一種不穩定同位素核伽瑪射線的自發輻射。

Industry:Environment

放射性同位素

一種不穩定同位素衰變或崩裂自發性，發射輻射的元素。

Industry:Environment

rem

特別股劑量當量。劑量相當於對物等於拉德，乘以品質因數中吸收劑量。

Industry:Environment

倫琴 (R)

電離輻射照射的單位。是該伽馬或 x 光片生產離子在 1 立方釐米的標準條件下的乾燥空氣攜帶電荷的 1 個靜電單位所需的數額。後威廉倫琴發現 x 射線 1895 年的德國科學家命名。