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Dear Keith Barr,
You correctly understand essence of Overhauser effect. It is the
quantum phenomenon. There is a good information to the address
http://www.ultramag.com/OVERHAUS.HTM . Also there is a list for
more complete acquaintance. I can send ours paper where there are
useful things on proton and overhauser magnetometers. It is the
report at IAGA conference on instrumets for magnetic observatories.
Unfortunately volume is about 300 kilobytes and it does not accept
by listbot. Address to me individually who is interested.
Really there is a type of the Overhausert magnetometer which works
similarly of the laser, but this type has not sustained a
competition for many areas. Here I bring a fragment of the letter to
John Gerig, which I sent individually. I assumed that it will be
interesting for all :
"Dear John Gerig! ...I do not think that I can sell to you a bottle
though we offer for the industrial developers such opportunities
http://labqmag.virtualave.net/SENS-KIT.htm . The reason is not the
price though it is almost ten times more...Concerning to Overhauser
substance it is not a problem. You can freely buy in USA. For
example radical is sold by firm Aldrich (940 West Saint Paul
Avenue, Milwaukee, Wisconsin 53233 USA). It is a TEMPO nitroxide
spin label (4-Oxo-Tempo is the best). The price is about 10dollars
for gramme. Substance is stable up to many year. I shall open a
small secret which is well known. The oxygen is dissolved a little
in water (in petrol in 10 times more). The Overhauser effect
decreases at oxygen but the TEMPO will work in water . The normal
concentration is about 0.01 mole on litre of water.
If you want to try to make that: Make the coaxial (!) resonator
similarly mentioned web page. Work in a proton precession mode but
do not aspire to large current. The polarization field have to
about 2-3 Oe. Vary this current and resonant frequency about 60
(+-5)
You correctly understand essence of Overhauser effect. It is the
quantum phenomenon. There is a good information to the address
http://www.ultramag.com/OVERHAUS.HTM . Also there is a list for
more complete acquaintance. I can send ours paper where there are
useful things on proton and overhauser magnetometers. It is the
report at IAGA conference on instrumets for magnetic observatories.
Unfortunately volume is about 300 kilobytes and it does not accept
by listbot. Address to me individually who is interested.
Really there is a type of the Overhausert magnetometer which works
similarly of the laser, but this type has not sustained a
competition for many areas. Here I bring a fragment of the letter to
John Gerig, which I sent individually. I assumed that it will be
interesting for all :
"Dear John Gerig! ...I do not think that I can sell to you a bottle
though we offer for the industrial developers such opportunities
http://labqmag.virtualave.net/SENS-KIT.htm . The reason is not the
price though it is almost ten times more...Concerning to Overhauser
substance it is not a problem. You can freely buy in USA. For
example radical is sold by firm Aldrich (940 West Saint Paul
Avenue, Milwaukee, Wisconsin 53233 USA). It is a TEMPO nitroxide
spin label (4-Oxo-Tempo is the best). The price is about 10dollars
for gramme. Substance is stable up to many year. I shall open a
small secret which is well known. The oxygen is dissolved a little
in water (in petrol in 10 times more). The Overhauser effect
decreases at oxygen but the TEMPO will work in water . The normal
concentration is about 0.01 mole on litre of water.
If you want to try to make that: Make the coaxial (!) resonator
similarly mentioned web page. Work in a proton precession mode but
do not aspire to large current. The polarization field have to
about 2-3 Oe. Vary this current and resonant frequency about 60
(+-5)