نتایج جستجو برای: nuclear parity

تعداد نتایج: 262886  

2002
Cheng-Pang Liu

The anapole moment is a parity-odd and time-reversal-even electromagnetic moment. Although it was conjectured shortly after the discovery of parity nonconservation, its existence has not been confirmed until recently in heavy nuclear systems, which are known to be the suitable laboratories because of the manybody enhancement. By carefully identifying the nuclear-spin-dependent atomic parity non...

Journal: :The European Physical Journal A 2005

1999
V. V. Flambaum

There are several factors which lead to a huge enhancement of parity and time invariance violating effects in the Ra atom: very close electronic levels of opposite parity, the large nuclear charge Z and the collective nature of T,P-odd nuclear moments. Experiments with Radium may be used to measure it's nuclear anapole, magnetic quadrupole and Schiff moments. Such measurements provide informati...

Journal: :Physical review 2022

In natural processes involving weak interactions, a violation of spatial parity conservation should appear. Although the parity-violation effects are expected to be observable in molecular systems, their tiny magnitude has prevented detection date. We present theoretical analysis four-component relativistic nuclear-spin-dependent parity-violating nuclear spin-rotation and NMR shielding tensors ...

Journal: :The European Physical Journal A 2023

Using an extended parity doublet model with the hidden local symmetry, we study some properties of nuclei in mean field approximation to see if could reproduce nuclear and also estimate value chiral invariant nucleon mass $$m_0$$ preferred by structure. We first determine our parameters using inputs from free space matter properties. Then, basic such as binding energy several different choices ...

Journal: :Journal of high energy physics, gravitation and cosmology 2022

The treatment of parity violations in the weak nuclear interactions is discussed within frameworks both Standard Model (SM) and Generation (GM) particle physics. It will be demonstrated that several important differences between these two models lead to SM merely describing violations, while GM provides an understanding cause interactions. significant arising from dubious assumptions made durin...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان خراسان رضوی - دانشکده علوم 1390

در این پایان نامه تغییر شکل هسته های ایزوتوپهای فرد عنصر لانتانیم با اعداد جرمی 123-137 را بر اساس مدل لایه ای تغییر شکل یافته (مدل نیلسون) که به علت ناتوانی مدل لایه ای کروی در توضیح ساختار هسته ها در خارج لایه بسته پیشنهاد گردید مورد بررسی قرار داده که در این مدل هسته به صورت بیضی دارای تقارن محوری در نظر گرفته می شود و همچنین با توجه به این که گشتاور –چهارقطبی در نتیجه خارج شدن هر توزیع باری...

2005
B. Desplanques

Parity violation in nuclear systems is reviewed. A few ingredients relevant to the description of the parity-violating nucleon-nucleon force in terms of meson exchanges are reminded. Effects in nuclear systems are then considered. They involve pp scattering, some complex nuclei and the deuteron system. PACS. 24.80.+y Nuclear tests of fundamental interactions and symmetries

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