搜索优化
English
搜索
Copilot
图片
视频
地图
资讯
购物
更多
航班
旅游
酒店
房地产
笔记本
Top stories
Sports
U.S.
Local
World
Science
Technology
Entertainment
Business
More
Politics
时间不限
过去 1 小时
过去 24 小时
过去 7 天
过去 30 天
按时间排序
按相关度排序
生活小课堂 on MSN
6 天
利用啁啾激光脉冲序列,正电子束被冷却至接近绝对零度
正电子束(Ps)是一种由电子及其反粒子正电子组成的奇异原子。这种纯粹的轻子系统在基础物理学中具有重要意义,因其简单性和进行量子电动力学(QED)精确测试的潜力。然而,正电子束的短寿命以及与多普勒展宽和反冲相关的挑战使得正电子束的激光冷却一直很困难。最 ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果
今日热点
DOJ reaches settlement
DA urges resentencing
Workers reject new contract
Accused of plagiarism
Oldest person in US dies
LA Times editor quits
Kristy now Category 4
Reporter struck by shrapnel
Grizzly bear fatally struck
CO elephants' rights case
Sued by ‘ring boys’
911 calls from rally released
Carbon removal firms report
US charges media tycoon
Georgia repels cyberattack
Hikes annual pass prices
Pneumococcal vax advice
Seeks WI ballot exit
Unveils new AI rules
Data privacy violations fine
PA provisional ballot ruling
To join Harris at rally
Wins EU antitrust case
New lead dust standards
Israeli strike on school
Philly synagogue targeted
Georgia citizenship audit
$135 million in Gaza aid
反馈