請順便解釋一下題意~~
更新1:
and with full width at half maximum about 110MeV/c^2 這句我不知該如何解讀比較恰當
物理問題(英文+物理高手進)
2010-01-23 2:30 am
Measurements of the mass of a subatomic particle yielded a mass distribution which is centered at 1230MeV/c^2,and with full width at half maximum about 110MeV/c^2. Estimate the lifetime of the particle
請順便解釋一下題意~~
請順便解釋一下題意~~
回答 (2)
2010-01-31 6:33 am
✔ 最佳答案
參考一下!△E=Γ/2 =h'/(2τ)
△E=Γ/2 = (1230-110) MeV,
h'= 6.58/10^16 eV‧s (Plank's constant)
so, τ= (6.58/10^16)/(2*1120*10^6)
=2.9/10^(25) (s)
2010-02-04 18:40:42 補充：
with full width at half maximum about 110MeV/c^2
在整個頻寬內,m=110MeV/c^2時,可得最大值的一半
2010-01-23 4:58 am
好像是半衰期的東西吧
收錄日期: 2021-04-30 14:18:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100122000010KK07695