Tнeory вeѕт | United States America (US)

Create: 2025-06-23 Update: 2025-07-07 06:08:13

آزمایش نمایش تشعشعات اورانیوم در محفظه شیشه‌ای (محفظه ابر):

هدف:
مشاهده‌ی مستقیم ذرات رادیواکتیو (آلفا یا بتا) که از نمونه اورانیوم منتشر می‌شوند.

ساختار محفظه:

یک محفظه‌ی شیشه‌ای یا پلاستیکی کوچک، کاملاً بسته.

درون آن معمولاً بخارات الکل (مثل ایزوپروپانول یا متانول) وجود دارد که نزدیک به نقطه‌ی اشباع است.

کف محفظه سرد است (با یخ خشک یا صفحه خنک‌کننده)، باعث می‌شود بخار الکل به حالت فرااشباع درآید.

فرایند:

یک تکه کوچک ماده‌ی رادیواکتیو (مثل اورانیوم یا توریم) داخل محفظه قرار داده می‌شود.

ذراتی که از ماده رها می‌شوند (آلفا یا بتا) به صورت خطوط کوتاه یا بلند از میعان بخار الکل نمایان می‌شوند.

مسیر حرکت ذرات مانند رد هواپیما در آسمان، به صورت رشته‌های باریک سفیدرنگ درون محفظه دیده می‌شود.

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Spiking bond yields driving sharp losses in tech stocks

A spike in interest rates since the start of the year has accelerated a rotation out of high-growth technology stocks and into value stocks poised to benefit from a reopening of the economy. The Nasdaq has fallen more than 10% over the past month as the Dow has soared to record highs, with a spike in the 10-year US Treasury yield acting as the main catalyst. It recently surged to a cycle high of more than 1.60% after starting the year below 1%. But according to Jim Paulsen, the Leuthold Group's chief investment strategist, rising interest rates do not represent a long-term threat to the stock market. Paulsen expects the 10-year yield to cross 2% by the end of the year. A spike in interest rates and its impact on the stock market depends on the economic backdrop, according to Paulsen. Rising interest rates amid a strengthening economy "may prove no challenge at all for stocks," Paulsen said.

آزمایش نمایش تشعشعات اورانیوم در محفظه شیشه‌ای (محفظه ابر):

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