View source for Ian Grant (physicist)

{{Short description|British mathematical physicist (born 1930)}}
{{Resume-like|date=September 2023}}
{{Use dmy dates|date=April 2022}}
'''Ian Philip Grant''', DPhil; FRS; CMath; FIMA, FRAS, FInstP <ref name=":0">{{Cite web|title=Grant, Prof. Ian Philip, (born 15 Dec. 1930), Professor of Mathematical Physics, University of Oxford, 1992–98, now Emeritus Professor; Tutorial Fellow in Mathematics, Pembroke College, Oxford, 1969–98, now Emeritus Fellow; Visiting Professor, Department of Applied Mathematics and Theoretical Physics, University of Cambridge, since 2013|url=https://www.ukwhoswho.com/view/10.1093/ww/9780199540884.001.0001/ww-9780199540884-e-17859|access-date=2021-01-10|website=WHO'S WHO & WHO WAS WHO|year=2007|language=en|doi=10.1093/ww/9780199540884.013.U17859|isbn=978-0-19-954088-4 }}</ref> (born 15 December 1930) is a [[Great Britain|British]] mathematical physicist. He is Emeritus Professor of Mathematical Physics at the University of Oxford and was elected a fellow of the [[Royal Society]] in 1992.<ref name=":1">{{Cite web|title=Ian Grant {{!}} Royal Society|url=https://royalsociety.org/people/ian-grant-11526/|access-date=2021-01-10|website=royalsociety.org|language=en-gb}}</ref> He is a pioneer in the field of [[computational physics]] and is internationally recognised as the principal author of GRASP, the General Relativistic Atomic Structure Program.<ref name=":3" />

== Education ==
[[St Albans School, Hertfordshire]] (1939-1948). Open Scholar in Natural Science, [[Wadham College, Oxford|Wadham College Oxford]],  MA (Mathematics) (1951). Clarendon Laboratory, [[University of Oxford]], D.Phil (1954).<ref name=":0" />

== Career ==

Source:<ref name=":0" />

UKAEA. Mathematical Physics Division, Aldermaston. Senior Scientific officer (1957-1962); Principal Scientific Officer (1962-1964).

Joint Research Fellowship, [[Atlas Computer Laboratory]] (Science Research Council) and [[Pembroke College, Oxford]] (1964-1969).

Tutorial Fellow in Mathematics, Pembroke College, Oxford, now Emeritus Fellow. (1969-1998)

[https://www.maths.ox.ac.uk/people/ian.grant Professor of Mathematical Physics, University of Oxford], now Emeritus Professor.(1992-1998)

Visiting Professor, Department of Applied Mathematics and Theoretical Physics, University of Cambridge. (2013-)

== Academic Research ==

Source:<ref name=":1" /><ref name=":2">{{Cite journal|last=Karwowski|first=Jacek|date=July 2001|title=Ian P. Grant, FRS — a biographical note|url=http://dx.doi.org/10.1016/s0010-4655(01)00246-6|journal=Computer Physics Communications|volume=138|issue=1|pages=10–17|doi=10.1016/s0010-4655(01)00246-6|bibcode=2001CoPhC.138...10K|issn=0010-4655|url-access=subscription}}</ref><ref>{{Cite web|last=Grant|first=Ian|date=2013|title=Professor Ian P Grant - CV (Biographical Note)|url=https://www.maths.ox.ac.uk/system/files/user-cvs/ipg.pdf|archive-url=|archive-date=|access-date=|website=}}</ref>

Professor Ian Grant has made fundamental contributions to the development of the mathematical theory on relativistic effects in atomic physics, of importance for detailed studies of all atomic systems and particularly for heavy atoms and for highly ionised atoms in laboratory and astronomical plasmas.<ref name=":1" /> He has also been instrumental in the creation of computer codes<ref>{{Cite journal|last1=Scott|first1=T.C.|last2=Monagan|first2=M.B.|last3=Grant|first3=I.P.|last4=Saunders|first4=V.R.|date=1997|title=Numerical computation of molecular integrals via optimized (vectorized) FORTRAN code|url=https://www.sciencedirect.com/science/article/pii/S0168900297000594|journal=Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|volume=389|issue=1|pages=117–120|doi=10.1016/S0168-9002(97)00059-4|bibcode=1997NIMPA.389..117S |issn=0168-9002|url-access=subscription}}</ref> that are used worldwide (in particular GRASP)<ref>{{Cite journal|last1=Grant|first1=I.P.|last2=McKenzie|first2=B.J.|last3=Norrington|first3=P.H.|last4=Mayers|first4=D.F.|last5=Pyper|first5=N.C.|date=December 1980|title=An atomic multiconfigurational Dirac-Fock package|url=http://dx.doi.org/10.1016/0010-4655(80)90041-7|journal=Computer Physics Communications|volume=21|issue=2|pages=207–231|doi=10.1016/0010-4655(80)90041-7|bibcode=1980CoPhC..21..207G|issn=0010-4655|url-access=subscription}}</ref><ref name=":3">{{Cite journal|last1=Dyall|first1=K.G.|last2=Grant|first2=I.P.|last3=Johnson|first3=C.T.|last4=Parpia|first4=F.A.|last5=Plummer|first5=E.P.|date=October 1989|title=GRASP: A general-purpose relativistic atomic structure program|url=http://dx.doi.org/10.1016/0010-4655(89)90136-7|journal=Computer Physics Communications|volume=55|issue=3|pages=425–456|doi=10.1016/0010-4655(89)90136-7|bibcode=1989CoPhC..55..425D|issn=0010-4655|url-access=subscription}}</ref><ref>{{Cite journal|last1=Jönsson|first1=P.|last2=He|first2=X.|last3=Froese Fischer|first3=C.|last4=Grant|first4=I.P.|date=October 2007|title=The grasp2K relativistic atomic structure package|url=http://dx.doi.org/10.1016/j.cpc.2007.06.002|journal=Computer Physics Communications|volume=177|issue=7|pages=597–622|doi=10.1016/j.cpc.2007.06.002|bibcode=2007CoPhC.177..597J|issn=0010-4655|url-access=subscription}}</ref><ref>{{Cite journal|last1=Jönsson|first1=P.|last2=Gaigalas|first2=G.|last3=Bieroń|first3=J.|last4=Fischer|first4=C. Froese|last5=Grant|first5=I.P.|date=September 2013|title=New version: Grasp2K relativistic atomic structure package|url=http://dx.doi.org/10.1016/j.cpc.2013.02.016|journal=Computer Physics Communications|volume=184|issue=9|pages=2197–2203|doi=10.1016/j.cpc.2013.02.016|bibcode=2013CoPhC.184.2197J|issn=0010-4655|hdl=2043/16226|hdl-access=free}}</ref> and have had a major impact on the understanding of both the foundations of the relativistic theory of many electron systems and on the precision of theoretical interpretation of a variety of properties of atoms.<ref name=":2" /> Professor Grant and his co-workers extended this approach to the relativistic modelling of molecular electronic structure and the development of the BERTHA computer package.<ref>{{Cite book|last1=Quiney|first1=H. M.|title=Ab initio relativistic quantum chemistry: four-components good, two-components bad!**With apologies to George Orwell [1]|date=1998-01-01|chapter-url=http://www.sciencedirect.com/science/article/pii/S0065327608604050|volume=32|pages=1–49|editor-last=Löwdin|editor-first=Per-Olov|publisher=Academic Press|language=en|doi=10.1016/s0065-3276(08)60405-0|access-date=2021-01-11|last2=Skaane|first2=H.|last3=Grant|first3=I. P.|chapter=Ab initio relativistic quantum chemistry: Four-components good, two-components bad! |series=Advances in Quantum Chemistry |isbn=9780120348336 }}</ref> Further research work included studies of electron scattering from heavy atoms and of the structures of molecules containing heavy atoms, culminating in the creation of the DARC computer package, integrating modules designed for calculations using relativistic R-matrix approach and GRASP.<ref>{{Cite journal|last1=Norrington|first1=P H|last2=Grant|first2=I P|date=1981-04-14|title=Electron scattering from Ne II using the relativistic R-matrix method|url=http://dx.doi.org/10.1088/0022-3700/14/7/006|journal=Journal of Physics B: Atomic and Molecular Physics|volume=14|issue=7|pages=L261–L267|doi=10.1088/0022-3700/14/7/006|bibcode=1981JPhB...14L.261N|issn=0022-3700|url-access=subscription}}</ref><ref>{{Cite journal|last1=Norrington|first1=P H|last2=Grant|first2=I P|date=1987-09-28|title=Low-energy electron scattering by Fe XXIII and Fe VII using the Dirac R-matrix method|url=http://dx.doi.org/10.1088/0022-3700/20/18/023|journal=Journal of Physics B: Atomic and Molecular Physics|volume=20|issue=18|pages=4869–4881|doi=10.1088/0022-3700/20/18/023|bibcode=1987JPhB...20.4869N|issn=0022-3700|url-access=subscription}}</ref><ref>{{Citation|last1=Wijesundera|first1=Wasantha|title=Electron scattering from atomic targets: application of Dirac R-matrix theory|date=1998|url=https://www.cambridge.org/core/books/manybody-atomic-physics/electron-scattering-from-atomic-targets-application-of-dirac-rmatrix-theory/9D80E1D0C486D21D45861E6FB6E21EF1|work=Many-Body Atomic Physics|pages=325–348|editor-last=Boyle|editor-first=J. J.|place=Cambridge|publisher=Cambridge University Press|doi=10.1017/cbo9780511470790.016|isbn=978-0-521-47006-3|access-date=2021-01-11|last2=Grant|first2=Ian|last3=Norrington|first3=Patrick|editor2-last=Pindzola|editor2-first=M. S.|url-access=subscription}}</ref> He also led important earlier work on radiative transfer in stellar and planetary atmospheres.<ref>{{Cite journal|last1=Grant|first1=Ian Philip|last2=Hunt|first2=G. E.|last3=Flowers|first3=Brian Hilton|date=1969-10-21|title=Discrete space theory of radiative transfer I. Fundamentals|url=https://royalsocietypublishing.org/doi/10.1098/rspa.1969.0187|journal= Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences|volume=313|issue=1513|pages=183–197|doi=10.1098/rspa.1969.0187|bibcode=1969RSPSA.313..183G|s2cid=123320528|url-access=subscription}}</ref><ref>{{Cite journal|last1=Grant|first1=Ian Philip|last2=Hunt|first2=G. E.|last3=Flowers|first3=Brian Hilton|date=1969-10-21|title=Discrete space theory of radiative transfer II. Stability and non-negativity|url=https://royalsocietypublishing.org/doi/10.1098/rspa.1969.0188|journal= Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences|volume=313|issue=1513|pages=199–216|doi=10.1098/rspa.1969.0188|bibcode=1969RSPSA.313..199G|s2cid=121094462|url-access=subscription}}</ref><ref>{{Cite journal|last1=Grant|first1=I. P.|last2=Peraiah|first2=A.|date=1972-11-01|title=Spectral Line Formation in Extended Stellar Atmospheres|journal=Monthly Notices of the Royal Astronomical Society|volume=160|issue=3|pages=239–247|doi=10.1093/mnras/160.3.239|bibcode=1972MNRAS.160..239G|issn=0035-8711|doi-access=free}}</ref>

Professor Grant’s book Relativistic Quantum Theory of Atoms and Molecules: Theory and Computation<ref>{{Cite book|last=Grant, I. P.|url=https://www.worldcat.org/oclc/186506935|title=Relativistic quantum theory of atoms and molecules : theory and computation|date=2007|publisher=Springer|isbn=978-0-387-35069-1|location=New York|oclc=186506935}}</ref><ref>{{Cite journal|last=Johnson|first=Walter|date=January 2008|title=Relativistic Quantum Theory of Atoms and Molecules: Theory and Computation Relativistic Quantum Theory of Atoms and Molecules: Theory and Computation, I. P. Grant, Springer, New York, 2007. $199.00 (797 pp.). ISBN 978-0387-34671-7|journal=Physics Today|volume=61|issue=1|pages=62|doi=10.1063/1.2835158|issn=0031-9228|doi-access=free}}</ref> reviews the field of relativistic atomic and molecular structure to the mid-2000s.

==References==
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{{FRS 1992}}
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{{DEFAULTSORT:Grant, Ian}}
[[Category:1930 births]]
[[Category:Living people]]
[[Category:Alumni of Wadham College, Oxford]]
[[Category:British physicists]]
[[Category:Fellows of Pembroke College, Oxford]]
[[Category:Fellows of the Royal Society]]
[[Category:English Jews]]
[[Category:Jewish British physicists]]
[[Category:People educated at St Albans School, Hertfordshire]]


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