نتایج جستجو برای: neutron polarisation

تعداد نتایج: 49888  

2002
Peter Dawkins Paul Gregg Rosanna Scutella

Whilst employment levels in Australia are healthy when compared to those twenty years ago, the available work has become increasingly polarised into either all-work or no-work households. This paper measures the extent of polarisation that has taken place in Australia since 1982 with a measure that accounts for changes in individual based employment and family structure. We find that employment...

2002
Z. T. YAO

This paper describes an accelerated ageing experiment of transformer oil/paper insulation with preset moisture levels. These samples were tested with return voltage and polarisation/depolarisation measurements. Molecular weight has also been measured with Gel Permeation Chromatography (GPC). Results suggested the impact of moisture on the ageing of oil/paper insulation. An attempt has been made...

2004
Murthy M. C. Wu D. Sivco Cho

The spectral behaviour of device 5-90 at a current of 10 mA, well into the multimode regime, is shown in Fig. 3. Even though higherorder modes contain various fractions of both polar&ations, the hndamental mode polarisation is still pinned to the [01 11 crystal direction with a similar suppression ratio as before. This indicates that the polarisation selection mechanism may be strong enough for...

1999
Christian Schubert

The string-inspired technique is used for the calculation of vacuum polarisation tensors in constant electromagnetic fields. In the first part of this series, we give a detailed exposition of the method for the case of the QED one-loop N-photon amplitude in a general constant electromagnetic background field. The twopoint cases are calculated explicitly, leading to compact representations for t...

Journal: :Chemical communications 2017
Nick J Brownbill David Gajan Anne Lesage Lyndon Emsley Frédéric Blanc

We report 17O dynamic nuclear polarisation (DNP) enhanced solid-state NMR experiments at 18.8 T. Several formulations were investigated on the Mg(OH)2 compound. A signal enhancement factor of 17 could be obtained when the solid particles were incorporated into a glassy o-terphenyl matrix doped with BDPA using the Overhauser polarisation transfer scheme whilst the cross effect mechanism enabled ...

1998
B. Revenu

Polarisation measurements on the Cosmological Microwave Background (CMB) will be very difficult as the expected polarisation is not expected to exceed 10% of the signal. Therefore, noises of all origins must be searched for and carefully extracted. Low frequency drifts are expected to arise from mechanic, thermal and electronic origin. If not suitably treated they induce stripes on sky maps suc...

ژورنال: سنجش و ایمنی پرتو 2020

In this research, the applicability of several metal hydrides as neutron moderator and shielding for D-D fusion sources has been investigated by MCNPX code. The results have been investigated in three steps to find the materials with lower thermal, fast and total neutron fluxes than conventional shielding materials. The results show relative advantages of LaNi5H6, VH, TiH2, TaH, Mg (BH4)2, YH2,...

Journal: :Light: Science & Applications 2016

Journal: :Astronomy & Astrophysics 2018

Fateme Sabery Balajaddeh Mohadeseh Golshanian Vahid Zanganeh

Introduction: Recently head and neck cancer has pay attention to many researchers. Its therapeutic methods include surgery, chemotherapy, radiotherapy and Boron neutron capture therapy (BNCT). BNCT is better than conventional radiotherapy because it targets the tumor cell. This method involves two steps of infusion of stable 10B and then neutron radiation with a suitable intens...

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